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List Of Kreutz Sungrazers
The Kreutz sungrazers are a group of comets descended from the breakup of a comet in about 326 AD. They are typically traveling less than 2 Solar radius, solar radii from the Sun. Because they travel so close, they often burn up. Many bright comets are members of the group, including Comet Ikeya–Seki, which broke in 3 pieces in its 1965 perihelion. The Kreutz sungrazers can be subdivided into several groups- a primary group at Orbital inclination, inclination ~144° and Longitude of ascending node, node ~5, and a secondary, smaller group at inclination ~139° node ~350°. The entire group spans several Degree (angle), degrees across in their orbits, and make up a significant portion of the known comets in the Solar System—as of November 2015 about 3000 of the 4000 known comets belong to the Kreutz sungrazers group. {, class="wikitable sortable" , - ! align="left" , Astronomical naming conventions#Comets, Comet designation ! align="left" , Comet name ! align="left" , Orb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comet
A comet is an icy, small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process that is called outgassing. This produces a visible atmosphere or coma, and sometimes also a tail. These phenomena are due to the effects of solar radiation and the solar wind acting upon the nucleus of the comet. Comet nuclei range from a few hundred meters to tens of kilometers across and are composed of loose collections of ice, dust, and small rocky particles. The coma may be up to 15 times Earth's diameter, while the tail may stretch beyond one astronomical unit. If sufficiently bright, a comet may be seen from Earth without the aid of a telescope and may subtend an arc of 30° (60 Moons) across the sky. Comets have been observed and recorded since ancient times by many cultures and religions. Comets usually have highly eccentric elliptical orbits, and they have a wide range of orbital periods, ranging from several years to potentially several mill ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Comet Of 1843
The Great Comet of 1843, formally designated C/1843 D1 and 1843 I, was a long-period comet which became very bright in March 1843 (it is also known as the Great March Comet). It was discovered on February 5, 1843, and rapidly brightened to become a great comet. It was a member of the Kreutz Sungrazers, a family of comets resulting from the breakup of a parent comet (X/1106 C1) into multiple fragments in about 1106. These comets pass extremely close to the surface of the Sun—within a few solar radii—and often become very bright as a result. Perihelion First observed in early February, 1843, it raced toward an incredibly close perihelion of less than 830,000 km on February 27, 1843; at this time it was observed in broad daylight roughly a degree away from the Sun. It passed closest to Earth on March 6, 1843, and was at its greatest brilliance the following day; unfortunately for observers north of the equator, at its peak it was best visible from the Southern Hemispher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
C/2011 W3 (Lovejoy)
Comet Lovejoy, formally designated C/2011 W3 (Lovejoy), is a long-period comet and Kreutz sungrazer. It was discovered in November 2011 by Australian amateur astronomer Terry Lovejoy. The comet's perihelion took it through the Sun's corona on 16 December 2011, after which it emerged intact, though greatly impacted by the event. As Comet Lovejoy was announced on the 16th anniversary of the SOHO satellite's launch it became known as "The Great Birthday Comet of 2011", and because it was visible from Earth during the Christmas holiday it was also nicknamed "The Great Christmas Comet of 2011". Discovery Comet Lovejoy was discovered on 27 November 2011 by Terry Lovejoy of Thornlands, Queensland, during a comet survey using a Schmidt–Cassegrain telescope and a QHY9 CCD camera. It is the third comet discovered by Terry Lovejoy. He reported that it was "a rapidly moving fuzzy object" of 13th magnitude, and additional observations were made by him over the next couple of nights. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
STEREO
Stereophonic sound, or more commonly stereo, is a method of sound reproduction that recreates a multi-directional, 3-dimensional audible perspective. This is usually achieved by using two independent audio channels through a configuration of two loudspeaker A loudspeaker (commonly referred to as a speaker or speaker driver) is an electroacoustic transducer that converts an electrical audio signal into a corresponding sound. A ''speaker system'', also often simply referred to as a "speaker" or " ...s (or stereo headphones) in such a way as to create the impression of sound heard from various directions, as in natural hearing. Because the multi-dimensional perspective is the crucial aspect, the term ''stereophonic'' also applies to systems with more than two channels or speakers such as quadraphonic and surround sound. Binaural recording, Binaural sound systems are also ''stereophonic''. Stereo sound has been in common use since the 1970s in entertainment media such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar And Heliospheric Observatory
The Solar and Heliospheric Observatory (SOHO) is a European Space Agency (ESA) spacecraft built by a European industrial consortium led by Matra Marconi Space (now Airbus Defence and Space) that was launched on a Lockheed Martin Atlas IIAS launch vehicle on 2 December 1995, to study the Sun. It has also discovered over 4,000 comets.(2,703 discoveries as of 21 April 2014) It began normal operations in May 1996. It is a joint project between the (ESA) and . SOHO was part of the Interna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Maximum Mission
The Solar Maximum Mission satellite (or SolarMax) was designed to investigate Sun, Solar phenomena, particularly solar flares. It was launched on February 14, 1980. The SMM was the first satellite based on the Multimission Modular Spacecraft bus manufactured by Fairchild Industries, a platform which was later used for Landsat 4, Landsats 4 and Landsat 5, 5 as well as the Upper Atmosphere Research Satellite. After an attitude control failure in Nov 1980 it was put in standby mode until April 1984 when it was repaired by a Shuttle mission. The Solar Maximum Mission ended on December 2, 1989, when the spacecraft Atmospheric reentry, re-entered the atmosphere and burned up over the Indian Ocean. Instruments Failure and repair The white-light coronagraph/polarimeter (C/P) took coronal images for about six months from March 1980 before suffering an electronics failure in September that prevented operation. In November 1980, the second of four fuses in SMM's attitude control system ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solwind
P78-1 or Solwind was a United States satellite launched aboard an Atlas F rocket from Vandenberg Air Force Base in California on February 24, 1979. The satellite's mission was extended by several weeks, so that it operated until it was destroyed in orbit on September 13, 1985, to test the ASM-135 ASAT anti-satellite missile. Construction and payload The satellite's Orbiting Solar Observatory (OSO) platform included a solar-oriented sail and a rotating wheel section. Ball Aerospace was the primary contractor for design and construction, and provided the attitude control and determination computer programs. The P78-1 carried a gamma-ray spectrometer, a white-light coronagraph, an extreme-ultraviolet imager, an X-ray spectrometer, a high-latitude particle spectrometer, an aerosol monitor, and an X-ray monitor. The X-ray monitor, designated NRL-608 or XMON, was a collaboration between the Naval Research Laboratory and Los Alamos National Laboratory. The white-light coronagraph and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tsutomu Seki
is a Japanese astronomer and discoverer of minor planets and comets, born in Kōchi, Japan. Career Tsutomu Seki is the Director of the Geisei Observatory in Kōchi, and in charge of the Comet Section of the Oriental Astronomical Association. Between 1961 and 1970, he had visually discovered six comets, including C/1965 S1 (Ikeya-Seki), the well known great comet of 1965. He has also discovered a large number of asteroids such as 13553 Masaakikoyama and , a near-Earth Amor asteroid and a Jupiter trojan, respectively. Many of his discoveries are named after famous sites in Kōchi, such as Harimaya-bashi, Ryōma (after Sakamoto Ryōma), Katsurahama beach, and Kagami-gawa. Awards and honors Asteroid 3426 Seki, discovered by Karl Reinmuth at the Heidelberg Observatory in 1932, was named in his honor. The official naming citation was published by the Minor Planet Center The Minor Planet Center (MPC) is the official body for observing and reporting on minor planets under th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kaoru Ikeya
is a Japanese amateur astronomer who discovered a number of comets. As a young adult, Ikeya lived near Lake Hamana and worked for a piano factory. During his employment there, he made his first discovery in 1963 with an optical telescope he built himself within his low budget. Two years later, he discovered the bright comet C/1965 S1 (Ikeya-Seki). Ikeya discovered the periodic comet 153P/Ikeya-Zhang on February 1, 2002 in Mori, Hokkaidō. The asteroid 4037 Ikeya is also named after Ikeya. On November 13, 2010, Ikeya discovered the P/2010 V1 (Ikeya-Murakami) comet using an optical telescope, rare in an era with access to digital imaging technology. Ikeya contributed his skill to the perfectly ground optics used in the construction of the Pentax 40cm Cassegrain reflector telescope installed at the Singapore Science Centre The Science Centre Singapore, previously known as Singapore Science Centre is a scientific institution in Jurong East, Singapore, specialising in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
C/1963 R1
Comet Pereyra (formal designations: C/1963 R1, 1963 V, and 1963e) was a bright comet which appeared in 1963. It was a member of the Kreutz Sungrazers, a group of comets which pass extremely close to the Sun. Discovery The comet was first seen on 14 September 1963, by Z.M. Pereyra of Cordoba observatory in Argentina. British observer George Alcock later reported that he had observed a thin pencil-like beam of light low in the sky on 12 September, which may have been the comet's tail. It was bright, at apparent magnitude 2, and had a short tail about 1 degree long. Over the next few days, the comet faded rapidly, having evidently already passed perihelion, although its tail grew to about 10° in length by late September. During its short period of naked eye visibility it was widely observed throughout the southern hemisphere. Orbital studies As the comet receded from the Sun, orbital studies showed that Pereyra had been a sungrazing comet, passing just 60,000 kilometres f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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