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Pioneer 10
Pioneer 10
(originally designated Pioneer F) is an American space probe, launched in 1972 and weighing 258 kilograms (569 pounds), that completed the first mission to the planet Jupiter.[1] Thereafter, Pioneer 10
Pioneer 10
became the first of five artificial objects to achieve the escape velocity that will allow them to leave the Solar System. This space exploration project was conducted by the NASA
NASA
Ames Research Center in California, and the space probe was manufactured by TRW Inc. Pioneer 10
Pioneer 10
was assembled around a hexagonal bus with a 2.74-meter (9 ft 0 in) diameter parabolic dish high-gain antenna, and the spacecraft was spin stabilized around the axis of the antenna. Its electric power was supplied by four radioisotope thermoelectric generators that provided a combined 155 watts at launch. It was launched on March 2, 1972, by an Atlas-Centaur
Atlas-Centaur
expendable vehicle from Cape Canaveral, Florida. Between July 15, 1972, and February 15, 1973, it became the first spacecraft to traverse the asteroid belt. Photography of Jupiter
Jupiter
began November 6, 1973, at a range of 25,000,000 kilometers (16,000,000 mi), and a total of about 500 images were transmitted. The closest approach to the planet was on December 4, 1973, at a range of 132,252 kilometers (82,178 mi). During the mission, the on-board instruments were used to study the asteroid belt, the environment around Jupiter, the solar wind, cosmic rays, and eventually the far reaches of the Solar System and heliosphere.[1] Radio communications
Radio communications
were lost with Pioneer 10
Pioneer 10
on January 23, 2003, because of the loss of electric power for its radio transmitter, with the probe at a distance of 12 billion kilometers (80 AU) from Earth.

Contents

1 Mission background

1.1 History 1.2 Spacecraft design

1.2.1 Power and communications 1.2.2 Scientific instruments

2 Mission profile

2.1 Launch and trajectory 2.2 Encounter with Jupiter 2.3 Deep space 2.4 Timeline

3 Current status and future 4 Pioneer plaque 5 Pioneer 10
Pioneer 10
in popular media 6 See also 7 References

7.1 Bibliography

8 External links

Mission background[edit] History[edit]

Pioneer 10
Pioneer 10
in the final stages of construction

Pioneer 10
Pioneer 10
on a Star-37E kick motor just prior to being encapsulated for launch

In the 1960s, American aerospace engineer Gary Flandro of the NASA
NASA
Jet Propulsion Laboratory conceived of a mission, known as the Planetary Grand Tour, that would exploit a rare alignment of the outer planets of the Solar System. This mission would ultimately be accomplished in the late 1970s by the two Voyager probes, but in order to prepare for it, NASA
NASA
decided in 1964 to experiment with launching a pair of probes to the outer Solar System.[2] An advocacy group named the Outer Space Panel and chaired by American space scientist James A. Van Allen, worked out the scientific rationale for exploring the outer planets.[3][4] NASA
NASA
Goddard Spaceflight Center put together a proposal for a pair of "Galactic Jupiter
Jupiter
Probes" that would pass through the asteroid belt and visit Jupiter. These were to be launched in 1972 and 1973 during favorable windows that occurred only a few weeks every 13 months. Launch during other time intervals would have been more costly in terms of propellant requirements.[5] Approved by NASA
NASA
in February 1969,[5] the twin spacecraft were designated Pioneer F and Pioneer G before launch; later they were named Pioneer 10
Pioneer 10
and Pioneer 11. They formed part of the Pioneer program,[6] a series of United States unmanned space missions launched between 1958 and 1978. This model was the first in the series to be designed for exploring the outer Solar System. Based on multiple proposals issued throughout the 1960s, the early mission objectives were to explore the interplanetary medium past the orbit of Mars, study the asteroid belt and assess the possible hazard to spacecraft traveling through the belt, and explore Jupiter
Jupiter
and its environment.[7] Later development-stage objectives included the probe closely approaching Jupiter
Jupiter
to provide data on the effect the environmental radiation surrounding Jupiter
Jupiter
would have on the spacecraft instruments. More than 150 scientific experiments were proposed for the missions.[8] The experiments to be carried on the spacecraft were selected in a series of planning sessions during the 1960s, then were finalized by early 1970. These would be to perform imaging and polarimetry of Jupiter
Jupiter
and several of its satellites, make infrared and ultraviolet observations of Jupiter, detect asteroids and meteoroids, determine the composition of charged particles, and to measure magnetic fields, plasma, cosmic rays and the Zodiacal Light.[7] Observation of the spacecraft communications as it passed behind Jupiter
Jupiter
would allow measurements of the planetary atmosphere, while tracking data would improve estimates of the mass of Jupiter
Jupiter
and its moons.[7] NASA
NASA
Ames Research Center, rather than Goddard, was selected to manage the project as part of the Pioneer program.[5] The Ames Research Center, under the direction of Charles F. Hall, was chosen because of its previous experience with spin-stabilized spacecraft. The requirements called for a small, lightweight spacecraft which was magnetically clean and which could perform an interplanetary mission. It was to use spacecraft modules that had already been proven in the Pioneer 6 through 9 missions.[7] In February 1970, Ames awarded a combined $380 million contract to TRW for building both of the Pioneer 10
Pioneer 10
and 11 vehicles, bypassing the usual bidding process to save time. B. J. O'Brien and Herb Lassen led the TRW team that assembled the spacecraft.[9] Design and construction of the spacecraft required an estimated 25 million man-hours.[10] An engineer from TRW said "This spacecraft is guaranteed for two years of interplanetary flight. If any component fails within that warranty period, just return the spacecraft to our shop and we will repair it free of charge."[11] To meet the schedule, the first launch would need to take place between February 29 and March 17 so that it could arrive at Jupiter
Jupiter
in November 1974. This was later revised to an arrival date of December 1973 in order to avoid conflicts with other missions over the use of the Deep Space Network
Deep Space Network
for communications, and to miss the period when Earth and Jupiter
Jupiter
would be at opposite sides of the Sun. The encounter trajectory for Pioneer 10
Pioneer 10
was selected to maximize the information returned about the radiation environment around Jupiter, even if this caused damage to some systems. It would come within about three times the radius of the planet, which was thought to be the closest it could approach and still survive the radiation. The trajectory chosen would give the spacecraft a good view of the sunlit side.[12] Spacecraft design[edit]

Pioneer 10
Pioneer 10
and Pioneer 11
Pioneer 11
spacecraft diagram

The Pioneer 10
Pioneer 10
bus measured 36 centimeters (14 in) deep and with six 76-centimeter (30 in) long panels forming the hexagonal structure. The bus housed propellant to control the orientation of the probe and eight of the eleven scientific instruments. The equipment compartment lay within an aluminum honeycomb structure to provide protection from meteoroids. A layer of insulation, consisting of aluminized mylar and kapton blankets, provided passive thermal control. Heat was generated by the dissipation of 70 to 120 watts (W) from the electrical components inside the compartment. The heat range was maintained within the operating limits of the equipment by means of louvers located below the mounting platform.[13] The spacecraft had a launch mass of about 260 kilograms (570 lb).[1]:42 At launch, the spacecraft carried 36 kilograms (79 lb) of liquid hydrazine monopropellant in a 42-centimeter (17 in) diameter spherical tank.[13] Orientation of the spacecraft was maintained with six 4.5 N,[14] hydrazine thrusters mounted in three pairs. Pair one maintained a constant spin-rate of 4.8 rpm, pair two controlled the forward thrust, and pair three controlled the attitude. The attitude pair were used in conical scanning maneuvers to track Earth in its orbit.[15] Orientation information was also provided by a star sensor able to reference Canopus, and two Sun sensors.[16] Power and communications[edit]

Two of the SNAP-19
SNAP-19
RTGs mounted on an extension boom

Testing spin rotation centered along the main communication dish axis

Pioneer 10
Pioneer 10
used four SNAP-19
SNAP-19
radioisotope thermoelectric generators (RTGs). They were positioned on two three-rod trusses, each 3 meters (9.8 ft) in length and 120 degrees apart. This was expected to be a safe distance from the sensitive scientific experiments carried on board. Combined, the RTGs provided 155 W at launch, and decayed to 140 W in transit to Jupiter. The spacecraft required 100 W to power all systems.[1]:44–45 The generators were powered by the radioisotope fuel plutonium-238, which was housed in a multi-layer capsule protected by a graphite heat shield.[17] The pre-launch requirement for the SNAP-19
SNAP-19
was to provide power for two years in space; this was greatly exceeded during the mission.[18] The plutonium-238 has a half-life of 87.74 years, so that after 29 years the radiation being generated by the RTGs was at 80% of its intensity at launch. However, steady deterioration of the thermocouple junctions led to a more rapid decay in electrical power generation, and by 2001 the total power output was 65 W. As a result, later in the mission only selected instruments could be operated at any one time.[13] The space probe included a redundant system of transceivers, one attached to the narrow-beam, high-gain antenna, the other to an omni-antenna and medium-gain antenna. The parabolic dish for the high-gain antenna was 2.74 meters (9.0 ft) in diameter and made from an aluminum honeycomb sandwich material. The spacecraft was spun about an axis that was parallel to the axis of this antenna so that it could remain oriented toward the Earth.[13] Each transceiver was 8 W and transmitted data across the S-band
S-band
using 2110 MHz for the uplink from Earth and 2292 MHz for the downlink to Earth with the Deep Space Network
Deep Space Network
tracking the signal. Data to be transmitted was passed through a convolutional encoder so that most communication errors could be corrected by the receiving equipment on Earth.[1]:43 The data transmission rate at launch was 256 bit/s, with the rate degrading by about −1.27 millibit/s for each day during the mission.[13] Much of the computation for the mission was performed on Earth and transmitted to the spacecraft, where it was able to retain in memory up to five commands of the 222 possible entries by ground controllers. The spacecraft included two command decoders and a command distribution unit, a very limited form of processor, to direct operations on the spacecraft. This system required that mission operators prepare commands long in advance of transmitting them to the probe. A data storage unit was included to record up to 6,144 bytes of information gathered by the instruments. The digital telemetry unit was used to prepare the collected data in one of the thirteen possible formats before transmitting it back to Earth.[1]:38 Scientific instruments[edit]

Helium Vector Magnetometer
Magnetometer
(HVM)

This instrument measured the fine structure of the interplanetary magnetic field, mapped the Jovian magnetic field, and provided magnetic field measurements to evaluate solar wind interaction with Jupiter. The magnetometer consisted of a helium-filled cell mounted on a 6.6–m boom to partly isolate the instrument from the spacecraft's magnetic field.[19]

Principal investigator: Edward Smith / JPL Data: PDS/PPI data catalog, NSSDC data archive

Quadrispherical Plasma Analyzer

Peered through a hole in the large dish-shaped antenna to detect particles of the solar wind originating from the Sun.[20]

Principal investigator: Aaron Barnes / NASA
NASA
Ames Research Center (archived website)[21] Data: PDS/PPI data catalog, NSSDC data archive

Charged Particle Instrument (CPI)

Detected cosmic rays in the Solar System.[22]

Principal investigator: John Simpson / University of Chicago[21] Data: NSSDC data archive

Cosmic Ray
Cosmic Ray
Telescope (CRT)

Collected data on the composition of the cosmic ray particles and their energy ranges.[23]

Principal investigator: Frank B. McDonald
Frank B. McDonald
/ NASA
NASA
Goddard Space Flight Center[21] Data: PDS/PPI data catalog, NSSDC data archive

Geiger Tube Telescope (GTT)

Surveyed the intensities, energy spectra, and angular distributions of electrons and protons along the spacecraft's path through the radiation belts of Jupiter.[24]

Principal investigator: James A. Van Allen
James A. Van Allen
/ University of Iowa (website)[21] Data: PDS/PPI data catalog, NSSDC data archive

Trapped Radiation
Radiation
Detector (TRD)

Included an unfocused Cerenkov counter that detected the light emitted in a particular direction as particles passed through it recording electrons of energy, 0.5 to 12 MeV, an electron scatter detector for electrons of energy, 100 to 400 keV, and a minimum ionizing detector consisting of a solid-state diode that measured minimum ionizing particles (<3 MeV) and protons in the range of 50 to 350 MeV.[25]

Principal investigator: R. Fillius / University of California
California
San Diego[21] Data: NSSDC data archive

Meteoroid
Meteoroid
Detectors

Twelve panels of pressurized cell detectors mounted on the back of the main dish antenna recorded penetrating impacts of small meteoroids.[26]

Principal investigator: William Kinard / NASA
NASA
Langley Research Center[21] Data: NSSDC data archive list

Asteroid/ Meteoroid
Meteoroid
Detector (AMD)

Meteoroid-asteroid detector looked into space with four non-imaging telescopes to track particles ranging from close-by bits of dust to distant large asteroids.[27]

Principal investigator: Robert Soberman / General Electric Company[21] Data: NSSDC data archive

Ultraviolet Photometer

Ultraviolet light was sensed to determine the quantities of hydrogen and helium in space and on Jupiter.[28]

Principal investigator: Darrell Judge / University of Southern California[21] Data: PDS/PPI data catalog, NSSDC data archive

Imaging Photopolarimeter (IPP)

The imaging experiment relied upon the spin of the spacecraft to sweep a small telescope across the planet in narrow strips only 0.03 degrees wide, looking at the planet in red and blue light. These strips were then processed to build up a visual image of the planet.[29]

Principal investigator: Tom Gehrels
Tom Gehrels
/ University of Arizona[21] Data: NSSDC data archive list

Infrared Radiometer

Provided information on cloud temperature and the output of heat from Jupiter.[30]

Principal investigator: Andrew Ingersoll / California
California
Institute of Technology[21]

Mission profile[edit] Launch and trajectory[edit]

The launch of Pioneer 10

Pioneer 10
Pioneer 10
interplanetary trajectory

Map comparing locations and trajectories of the Pioneer 10
Pioneer 10
(blue), Pioneer 11
Pioneer 11
(green), Voyager 2
Voyager 2
( red) and Voyager 1
Voyager 1
(purple) spacecraft, as of 2007

Pioneer 10
Pioneer 10
was launched on March 3, 1972 at 01:49:00 UTC (March 2 local time) by the National Aeronautics and Space Administration
National Aeronautics and Space Administration
from Space Launch Complex 36A in Florida, aboard an Atlas-Centaur
Atlas-Centaur
launch vehicle. The third stage consisted of a solid fuel TE364-4
TE364-4
developed specifically for the Pioneer missions. This stage provided about 15,000 pounds of thrust and spun up the spacecraft.[31] The spacecraft had an initial spin rate of 30 rpm. Twenty minutes following the launch, the vehicle's three booms were extended, which slowed the rotation rate to 4.8 rpm. This rate was maintained throughout the voyage. The launch vehicle accelerated the probe for net interval of 17 minutes, reaching a velocity of 51,682 km/h (32,114 mph).[32] After the high-gain antenna was contacted, several of the instruments were activated for testing while the spacecraft was moving through the Earth's radiation belts. Ninety minutes after launch, the spacecraft reached interplanetary space.[32] Pioneer 10
Pioneer 10
passed by the Moon
Moon
in 11 hours[33] and became the fastest human-made object at that time.[34] Two days after launch, the scientific instruments were turned on, beginning with the cosmic ray telescope. After ten days, all of the instruments were active.[33] During the first seven months of the journey, the spacecraft made three course corrections. The on-board instruments underwent checkouts, with the photometers examining Jupiter
Jupiter
and the Zodiacal light, and experiment packages being used to measure cosmic rays, magnetic fields and the solar wind. The only anomaly during this interval was the failure of the Canopus
Canopus
sensor, which instead required the spacecraft to maintain its orientation using the two Sun sensors.[32] While passing through interplanetary medium, Pioneer 10
Pioneer 10
became the first mission to detect interplanetary atoms of helium. It also observed high-energy ions of aluminum and sodium in the solar wind. On July 15, 1972, Pioneer 10
Pioneer 10
was the first spacecraft to enter the asteroid belt, located between the orbits of Mars
Mars
and Jupiter. The project planners expected a safe passage through the belt, and the closest the trajectory would take the spacecraft to any of the known asteroids was 8,800,000 kilometers (5,500,000 mi). One of the nearest approaches was to the asteroid 307 Nike on December 2, 1972.[35] The on-board experiments demonstrated a deficiency of particles below a micrometer (μm) in the belt, as compared to the vicinity of the Earth. The density of dust particles between 10–100 μm did not vary significantly during the trip from the Earth to the outer edge of the belt. Only for particles with a diameter of 100 μm to 1.0 mm did the density show an increase, by a factor of three in the region of the belt. No fragments larger than a millimeter were observed in the belt, indicating these are likely rare; certainly much less common than anticipated. As the spacecraft did not collide with any particles of substantial size, it passed safely through the belt, emerging on the other side about February 15, 1973.[36][37] Encounter with Jupiter[edit]

Pioneer 10's trajectory through the Jovian system

Pioneer 10
Pioneer 10
image of Jupiter
Jupiter
showing the Great Red Spot
Great Red Spot
near the right limb

The moon Ganymede as imaged by Pioneer 10

On November 6, 1973, the Pioneer 10
Pioneer 10
spacecraft was at a distance of 25 million kilometers (16×10^6 mi) from Jupiter. Testing of the imaging system began, and the data was successfully received back at the Deep Space Network. A series of 16,000 commands were then uploaded to the spacecraft to control the flyby operations during the next sixty days. The orbit of the outer moon Sinope was crossed on November 8. The bow shock of Jupiter's magnetosphere was reached on November 16, as indicated by a drop in the velocity of the solar wind from 451 km/s (280 mi/s) to 225 km/s (140 mi/s). The magnetopause was passed through a day later. The spacecraft instruments confirmed that the magnetic field of Jupiter
Jupiter
was inverted compared to that of Earth. By the 29th, the orbits of all of the outermost moons had been passed and the spacecraft was operating flawlessly.[38] Red and blue pictures of Jupiter
Jupiter
were being generated by the imaging photopolarimeter as the rotation of the spacecraft carried the instrument's field of view past the planet. These red and blue colors were combined to produce a synthetic green image, allowing a three-color combination to produce the rendered image. On November 26, a total of twelve such images were received back on Earth. By December 2, the image quality exceeded the best images made from Earth. These were being displayed in real-time back on Earth, and the Pioneer program would later receive an Emmy award
Emmy award
for this presentation to the media. The motion of the spacecraft produced geometric distortions that later had to be corrected by computer processing.[38] During the encounter, a total of more than 500 images were transmitted.[39] The trajectory of the spacecraft took it along the magnetic equator of Jupiter, where the ion radiation was concentrated.[40] Peak flux for this electron radiation is 10,000 times stronger than the maximum radiation around the Earth.[41] Starting on December 3, the radiation around Jupiter
Jupiter
caused false commands to be generated. Most of these were corrected by contingency commands, but an image of Io and a few close ups of Jupiter
Jupiter
were lost. Similar false commands would be generated on the way out from the planet.[38] Nonetheless, Pioneer 10 did succeed in obtaining images of the moons Ganymede and Europa. The image of Ganymede showed low albedo features in the center and near the south pole, while the north pole appeared brighter. Europa was too far away to obtain a detailed image, although some albedo features were apparent.[42] The trajectory of Pioneer 10
Pioneer 10
was chosen to take it behind Io, allowing the refractive effect of the moon's atmosphere on the radio transmissions to be measured. This demonstrated that the ionosphere of the moon was about 700 kilometers (430 mi) above the surface on the day side, and the density ranged from 60,000 electrons per cubic centimeter on the day side, down to 9,000 on the night face. An unexpected discovery was that Io was orbiting within a cloud of hydrogen that extended for about 805,000 kilometers (500,000 mi), with a width and height of 402,000 kilometers (250,000 mi). A smaller, 110,000 kilometers (68,000 mi) cloud was believed to have been detected near Europa.[42] It wasn't until after Pioneer 10
Pioneer 10
had cleared the asteroid belt that NASA
NASA
selected a trajectory towards Jupiter
Jupiter
that offered the slingshot effect that would send the spacecraft out of the solar system. Pioneer 10 was the first spacecraft to attempt such a maneuver and became a proof of concept for the missions that would follow. Such an extended mission was not originally something that was planned, but was planned for prior to launch.[43] At the closest approach, the velocity of the spacecraft reached 132,000 km/h,[44] and it came within 132,252 kilometers (82,178 mi) of the outer atmosphere of Jupiter. Close-up images of the Great Red Spot
Great Red Spot
and the terminator were obtained. Communication with the spacecraft then ceased as it passed behind the planet.[40] The radio occultation data allowed the temperature structure of the outer atmosphere to be measured, showing a temperature inversion between the altitudes with 10 and 100 mbar pressures. Temperatures at the 10 mbar level ranged from −133 to −113 °C (−207 to −171 °F), while temperatures at the 100 mbar level were −183 to −163 °C (−297.4 to −261.4 °F).[45] The spacecraft generated an infrared map of the planet, which confirmed the idea that the planet radiated more heat than it received from the Sun.[46] Crescent images of the planet were then returned as Pioneer 10
Pioneer 10
moved away from the planet.[47] As the spacecraft headed outward, it again passed the bow shock of Jupiter's magnetosphere. As this front is constantly shifting in space because of dynamic interaction with the solar wind, the vehicle crossed the bow shock a total of 17 times before it escaped completely.[48] Deep space[edit] Pioneer 10
Pioneer 10
crossed the orbit of Saturn in 1976 and the orbit of Uranus in 1979.[49] On June 13, 1983, the craft crossed the orbit of Neptune, the outermost planet, and so became the first human-made object to leave the proximity of the major planets of the Solar System. The mission came to an official end on March 31, 1997, when it had reached a distance of 67 AU from the Sun, though the spacecraft was still able to transmit coherent data after this date.[13] After March 31, 1997, Pioneer 10's weak signal continued to be tracked by the Deep Space Network
Deep Space Network
to aid the training of flight controllers in the process of acquiring deep space radio signals. There was an Advanced Concepts study applying chaos theory to extract coherent data from the fading signal.[50] The last successful reception of telemetry was received from Pioneer 10 on April 27, 2002; subsequent signals were barely strong enough to detect, and provided no usable data. The final, very weak signal from Pioneer 10
Pioneer 10
was received on January 23, 2003 when it was 12 billion kilometers (80 AU) from Earth.[51] Further attempts to contact the spacecraft were unsuccessful. A final attempt was made on the evening of March 4, 2006, the last time the antenna would be correctly aligned with Earth. No response was received from Pioneer 10.[52] NASA
NASA
decided that the RTG units had probably fallen below the power threshold needed to operate the transmitter. Hence, no further attempts at contact were made.[53] Timeline[edit]

Timeline of travel

Date Event

1972-03-03

Spacecraft launched

1972-06-

Crossed orbit of Mars

1972-07-15

Entered the asteroid belt

1972-07-15

Start Jupiter
Jupiter
observation phase

Time Event

1973-12-03

Encounter with Jovian system

12:26:00

Callisto flyby at 1,392,300 km

13:56:00

Ganymede flyby at 446,250 km

19:26:00

Europa flyby at 321,000 km

22:56:00

Io flyby at 357,000 km

1973-12-04

02:26:00

Jupiter
Jupiter
closest approach at 200,000 km

02:36:00

Jupiter
Jupiter
equator plane crossing

02:41:45

Io occultation entry

02:43:16

Io occultation exit

03:42:25

Jupiter
Jupiter
occultation entry

03:42:25

Jupiter
Jupiter
shadow entry

04:15:35

Jupiter
Jupiter
occultation exit

04:47:21

Jupiter
Jupiter
shadow exit

1974-01-01

Phase stop

1974-01-01

Begin Pioneer Interstellar Mission

More

1975-02-10

The US Post Office issued a commemorative stamp featuring the Pioneer 10 space probe (See image).

1983-04-25

Crossed orbit of Pluto, still defined as a planet at the time (Pluto's irregular orbit meant it was closer to the Sun than Neptune).[54]

1983-06-13

Crossed orbit of Neptune, the furthest planet away from the Sun at the time, to become the first human-made object to depart the Solar System.[55] By dialing 1-900-410-4111, one could access a recording provided by TRW that was made by slowing down and converting Pioneer 10's data feed to analog sounds.[56]

1997-03-31

End of mission. Contact is maintained with spacecraft to record telemetry.[57]

1998-02-17

Voyager 1
Voyager 1
overtakes Pioneer 10
Pioneer 10
as the most distant human-made object from the Sun, at 69.419 AU. Voyager 1
Voyager 1
is moving away from the Sun over 1 AU per year faster than Pioneer 10.[57]

2002-03-02

Successful reception of telemetry. 39 minutes of clean data received from a distance of 79.83 AU[58]

2002-04-27

Last successful reception of telemetry. 33 minutes of clean data received from a distance of 80.22 AU[58]

2003-01-23

Final signal received from the spacecraft. Reception was very weak and subsequent signals were barely strong enough to detect.[58]

2003-02-07

Unsuccessful attempt to contact spacecraft[58]

2005-12-30

Pioneer 10
Pioneer 10
was projected to be 89.7 AU, traveling at a velocity of 12.51 kilometers/second (28,000 miles/hour), which is approximately 0.000041 the speed of light.

2009-10-

Projections indicate that Pioneer 10
Pioneer 10
reached 100 AU. At this point, the spacecraft is approximately 271,000 AU from the nearest star (other than the Sun), Proxima Centauri.[59]

[1]:61–94[60][61]

Current status and future[edit]

Position of Pioneer 10
Pioneer 10
on 8 February 2012

On January 1, 2016, Pioneer 10
Pioneer 10
was predicted to be 114.07 au from the Earth (about 10 billion miles); and traveling at 12.04 km/s (26,900 mph) (relative to the Sun) and traveling outward at about 2.54 au per year.[62] Voyager 2
Voyager 2
is projected to pass Pioneer 10
Pioneer 10
by April 2019. Sunlight takes 14.79 hours to reach Pioneer 10. The brightness of the Sun from the spacecraft is magnitude −16.6.[62] Pioneer 10
Pioneer 10
is heading in the direction of the constellation Taurus.[62] If left undisturbed, Pioneer 10
Pioneer 10
and its sister craft Pioneer 11
Pioneer 11
will join the two Voyager spacecraft and the New Horizons
New Horizons
spacecraft in leaving the Solar System to wander the interstellar medium. The Pioneer 10
Pioneer 10
trajectory is expected to take it in the general direction of the star Aldebaran, currently located at a distance of about 68 light years. If Aldebaran
Aldebaran
had zero relative velocity, it would require more than two million years for the spacecraft to reach it.[13][63] A backup unit, Pioneer H, is currently on display in the "Milestones of Flight" gallery at the National Air and Space Museum
National Air and Space Museum
in Washington, D.C.[64] Many elements of the mission proved to be critical in the planning of the Voyager program.[65] Pioneer plaque[edit] Main article: Pioneer plaque

Pioneer Plaque

At the behest of Carl Sagan,[9] Pioneer 10
Pioneer 10
and Pioneer 11
Pioneer 11
carry a 152 by 229 mm (6.0 by 9.0 in) gold-anodized aluminum plaque in case either spacecraft is ever found by intelligent life-forms from another planetary system. The plaques feature the nude figures of a human male and female along with several symbols that are designed to provide information about the origin of the spacecraft.[66] The plaque is attached to the antenna support struts to provide some shielding from interstellar dust. Pioneer 10
Pioneer 10
in popular media[edit] In the film Star Trek V: The Final Frontier a Klingon ship destroys Pioneer 10
Pioneer 10
as target practice. In the webcomic "17776": Is one of the main characters See also[edit]

Spaceflight portal

Exploration of Jupiter

Pioneer 11, Jupiter
Jupiter
and Saturn fly-by Voyager 1
Voyager 1
and Voyager 2, Jupiter
Jupiter
fly-by en route to other outer Solar System fly-bys Galileo, Jupiter
Jupiter
orbiter Cassini–Huygens, Jupiter
Jupiter
fly-by for Saturn orbiter and Titan lander, respectively New Horizons, Jupiter
Jupiter
flyby en route to Pluto
Pluto
fly-by Juno, Jupiter
Jupiter
polar orbiter

List of artificial objects leaving the Solar System List of missions to the outer planets Pioneer anomaly Robotic spacecraft Timeline of artificial satellites and space probes 17776

References[edit]

^ a b c d e f g Fimmel, R. O.; W. Swindell; E. Burgess (1974). SP-349/396 PIONEER ODYSSEY. NASA-Ames Research Center. SP-349/396. Retrieved 2011-01-09.  ^ Launius 2004, p. 36. ^ Van Allen 2001, p. 155. ^ Burrows 1990, pp. 16. ^ a b c Burrows 1999, p. 476. ^ Burgess 1982, p. 16. ^ a b c d Mark, Hans (August 1974). "The Pioneer Jupiter
Jupiter
Mission". SP-349/396 Pioneer Odyssey. NASA. Retrieved 2011-07-06.  ^ Simpson 2001, p. 144. ^ a b Dyer 1998, p. 302. ^ Wolverton 2004, p. 124. ^ "PIONEER BEAT 'WARRANTY'". Aviation Week. Retrieved 2017-09-15.  ^ Burrows 1990, pp. 16–19. ^ a b c d e f g Anderson, John D.; Laing, Philip A.; Lau, Eunice L.; Liu, Anthony S.; Nieto, Michael Martin; Turyshev, Slava G.; et al. (April 2002). "Study of the anomalous acceleration of Pioneer 10
Pioneer 10
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/ National Space Science Data Center. Retrieved 2011-02-19.  ^ "Quadrispherical Plasma Analyzer". NASA
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/ National Space Science Data Center. Retrieved 2011-02-19.  ^ a b c d e f g h i j Simpson 2001, p. 146. ^ " Charged Particle Instrument (CPI)". NASA
NASA
/ National Space Science Data Center. Retrieved 2011-02-19.  ^ "Cosmic-Ray Spectra". NASA
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/ National Space Science Data Center. Retrieved 2011-02-19.  ^ "Geiger Tube Telescope (GTT)". NASA
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/ National Space Science Data Center. Retrieved 2011-02-19.  ^ "Jovian Trapped Radiation". NASA
NASA
/ National Space Science Data Center. Retrieved 2011-02-19.  ^ " Meteoroid
Meteoroid
Detectors". NASA
NASA
/ National Space Science Data Center. Retrieved 2011-02-19.  ^ "Asteroid/ Meteoroid
Meteoroid
Astronomy". NASA
NASA
/ National Space Science Data Center. Retrieved 2011-02-19.  ^ "Ultraviolet Photometry". NASA
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/ National Space Science Data Center. Retrieved 2011-02-19.  ^ "Imaging Photopolarimeter (IPP)". NASA
NASA
/ National Space Science Data Center. Retrieved 2011-02-19.  ^ "Infrared Radiometers". NASA
NASA
/ National Space Science Data Center. Retrieved 2011-02-19.  ^ " NASA
NASA
Glenn Pioneer Launch History". NASA/Glenn Research Center. March 7, 2003. Retrieved 2011-06-13.  ^ a b c Rogers 1995, p. 23. ^ a b Fimmel, van_Allen & Burgess 1980, p. 73. ^ Burrows 1990, pp. 17. ^ Fimmel, van_Allen & Burgess 1980, p. 75. ^ Staff (March 1, 1973). " Pioneer 10
Pioneer 10
beats the asteroid belt". New Scientist. New Scientist Publications. 57 (835): 470.  ^ Burgess 1982, p. 32. ^ a b c Fimmel, van_Allen & Burgess 1980, pp. 79–93. ^ Fimmel, van_Allen & Burgess 1980, p. 170. ^ a b Fimmel, van_Allen & Burgess 1980, p. 93. ^ Fimmel, van_Allen & Burgess 1980, p. 126. ^ a b Fimmel, van_Allen & Burgess 1980, p. 121. ^ " NASA
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says 'bye bye Birdie' to Pioneer 10
Pioneer 10
Spacecraft". The Salina Journal. 13 June 1983. Retrieved 6 December 2017.  ^ Fimmel, van_Allen & Burgess 1980, p. 79. ^ Fimmel, van_Allen & Burgess 1980, p. 135. ^ Fimmel, van_Allen & Burgess 1980, p. 141. ^ Fimmel, van_Allen & Burgess 1980, p. 90. ^ Fimmel, van_Allen & Burgess 1980, pp. 123–124. ^ Fimmel, van_Allen & Burgess 1980, p. 91. ^ Phillips, Tony (May 3, 2001). "Seven billion miles and counting". High Energy Astrophysics Science Archive Research Center, NASA. Retrieved 2011-06-07.  ^ "This Month in History", Smithsonian magazine, June 2003. ^ Lakdawalla, Emily (March 6, 2006). "The final attempt to contact Pioneer 10". The Planetary Society. Archived from the original on June 16, 2006. Retrieved 2011-06-07.  ^ Angelo 2007, p. 221. ^ Wilford, John Noble (April 26, 1983). " Pioneer 10
Pioneer 10
Pushes Beyond Goals, Into the Unknown". The New York Times. Retrieved 13 June 2011.  ^ "Pioneer 10". Solar System Exploration. NASA. Retrieved 13 June 2011.  ^ "The Galveston Daily News". The Galveston Daily News
The Galveston Daily News
on June 13, 1983. The Galveston Daily News. Retrieved 8 January 2014.  ^ a b Allen, J. A. Van (February 17, 1998). "Update on Pioneer 10". University of Iowa. Retrieved 2011-01-09.  ^ a b c d Allen, J. A. Van (February 20, 2003). "Update on Pioneer 10". University of Iowa. Retrieved 2011-01-09.  ^ "Cosmic Distance Scales - The Nearest Star". NASA. Retrieved 2011-06-07.  ^ " Pioneer 10
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Bibliography[edit]

Angelo, Joseph A. (2007). Robot spacecraft. Frontiers in space. Facts on File
File
science library. Infobase Publishing. ISBN 0-8160-5773-7  Burgess, Eric (1982). "Pioneer odysseys". By Jupiter: odysseys to a giant. Columbia University Press. ISBN 0-231-05176-X.  Burrows, William E. (1990). Exploring space: voyages in the solar system and beyond. Random House. ISBN 0-394-56983-0.  Burrows, William E. (1999). This new ocean: the story of the first space age. Modern Library. Random House Digital, Inc. ISBN 0-375-75485-7.  Dyer, Davis (1998). TRW: pioneering technology and innovation since 1900. Harvard Business Press. ISBN 0-87584-606-8.  Fimmel, Richard O.; van Allen, James; Burgess, Eric (1980). Pioneer: first to Jupiter, Saturn, and beyond. Washington D.C., USA: NASA Scientific and Technical Information Office.  Launius, Roger D. (2004). Frontiers of space exploration. Greenwood Press guides to historic events of the twentieth century (2nd ed.). Greenwood Publishing Group. ISBN 0-313-32524-3.  Rogers, John Hubert (1995). The giant planet Jupiter. Practical astronomy handbook series. 6. Cambridge University Press. ISBN 0-521-41008-8.  Simpson, J. A. (2001). "The cosmic radiation". In Johan A. M. Bleeker; Johannes Geiss; Martin C. E. Huber. The century of space science. 1. Springer. p. 146. ISBN 0-7923-7196-8.  Van Allen, James A. (2001). "Magnetospheric physics". In Johannes Alphonsus Marie Bleeker, Arturo Russo. The century of space science. 1. Springer. p. 155. ISBN 0-7923-7196-8. CS1 maint: Uses editors parameter (link) Wolverton, Mark (2004). The depths of space: the story of the Pioneer planetary probes. National Academies Press. ISBN 0-309-09050-4. 

External links[edit]

Wikimedia Commons has media related to Pioneer 10.

Pioneer Project Archive Page Pioneer 10
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Profile by NASA's Solar System Exploration NSSDC Pioneer 10
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documentary - 1974" on YouTube Hans Mark: Origin Story of Carl Sagan's Plaque on Pioneer 10
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← 1971  ·  Orbital launches in 1972  ·  1973 →

Kosmos 471 OPS 1737 · OPS 7719 Intelsat IV F-4 Kosmos 472 HEOS-2 Kosmos 473 Luna 20
Luna 20
Kosmos 474 OPS 1844 Kosmos 475 OPS 1570 Kosmos 476 Pioneer 10
Pioneer 10
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Kosmos 478 OPS 1678 Kosmos 479 OPS 5058 Kosmos 480 Kosmos 481 Venera 8
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Meteor-MV No.23 Kosmos 482 Kosmos 483 Molniya-1 No.27 · SRET-1 Kosmos 484 · Nauka-5KS No.3 Interkosmos 6 Kosmos 485 Prognoz 1 Kosmos 486 Apollo 16 (PFS-2) OPS 5640 Kosmos 487 DS-P1-Yu No. 51 Kosmos 488 Kosmos 489 Kosmos 490 · Nauka-1KS No.5 Molniya-2-2 OPS 6574 Kosmos 491 OPS 6371 Kosmos 492 Intelsat IV F-5
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Kosmos 493 Kosmos 494 Kosmos 495 Kosmos 496
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Prognoz 2 Interkosmos 7 Kosmos 497 Meteor-MV No.26 Kosmos 498 Kosmos 499 OPS 7293 · OPS 7803 Kosmos 500 Kosmos 501 Kosmos 502 Kosmos 503 Kosmos 504 · Kosmos 505 · Kosmos 506 · Kosmos 507 · Kosmos 508 · Kosmos 509 · Kosmos 510 · Kosmos 511 ERTS-1 Kosmos 512 DOS No.122 Kosmos 513 Explorer 46 Kosmos 514 Kosmos 515 Denpa Copernicus Kosmos 516 Kosmos 517 OPS 8888 Unnamed Triad 1 Kosmos 518 Kosmos 519 Kosmos 520 Explorer 47 Kosmos 521 Molniya-2-3 Radcat 2 · Radsat Kosmos 522 Kosmos 523 OPS 8314 · OPS 8314/2 Kosmos 524 Molniya-1 No.26 NOAA-2 · OSCAR-6 Unnamed Kosmos 525 · Nauka-16KS No.1L Kosmos 526 Meteor-M No.25 Kosmos 527 Kosmos 528 · Kosmos 529 · Kosmos 530 · Kosmos 531 · Kosmos 532 · Kosmos 533 · Kosmos 534 · Kosmos 535 Kosmos 536 OPS 7323 Anik A1
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Explorer 48 ESRO-4 Unnamed Kosmos 537 Interkosmos 8 Molniya-1 No.28 Apollo 17
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