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21 Piscis Austrini ...
This is the list of notable stars in the constellation Piscis Austrinus, sorted by decreasing brightness. See also *List of stars by constellation References * * * * * {{Stars of Piscis Austrinus *List Piscis Austrinus Piscis Austrinus is a constellation in the southern celestial hemisphere. The name is Latin for "the southern fish", in contrast with the larger constellation Pisces, which represents a pair of fish. Before the 20th century, it was also known as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Star
A star is an astronomical object comprising a luminous spheroid of plasma (physics), plasma held together by its gravity. The List of nearest stars and brown dwarfs, nearest star to Earth is the Sun. Many other stars are visible to the naked eye at night sky, night, but their immense distances from Earth make them appear as fixed stars, fixed points of light. The most prominent stars have been categorised into constellations and asterism (astronomy), asterisms, and many of the brightest stars have proper names. Astronomers have assembled star catalogues that identify the known stars and provide standardized stellar designations. The observable universe contains an estimated to stars. Only about 4,000 of these stars are visible to the naked eye, all within the Milky Way galaxy. A star's life star formation, begins with the gravitational collapse of a gaseous nebula of material composed primarily of hydrogen, along with helium and trace amounts of heavier elements. Its stellar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Brightest Stars
This is a list of stars arranged by their apparent magnitude – their brightness as observed from Earth. It includes all stars brighter than magnitude +2.50 in visible light, measured using a ''V''-band filter in the UBV photometric system. Stars in binary systems (or other multiples) are listed by their ''total'' or ''combined'' brightness if they appear as a single star to the naked eye, or listed separately if they do not. As with all magnitude systems in astronomy, the scale is logarithmic and inverted i.e. lower/more negative numbers are brighter. Most stars on this list appear bright from Earth because they are nearby, not because they are intrinsically luminous. For a list which compensates for the distances, converting the ''apparent'' magnitude to the ''absolute'' magnitude, see the list of most luminous stars. Measurement The Sun is the brightest star as viewed from Earth, at −26.74 mag. The second brightest is Sirius at −1.46 mag. For c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theta Piscis Austrini
Theta Piscis Austrini, Latinized as θ Piscis Austrini, is a binary star system in the southern constellation of Piscis Austrinus. It is faintly visible to the naked eye with a combined apparent visual magnitude of +5.01. Based upon an annual parallax shift of 10.16 mas as seen from the Earth, the system is located around 320 light years from the Sun. The system is drifting further away with a radial velocity of +13 km/s. The binary nature of this system was discovered in 1951 by South African astronomer W. S. Finsen. Both components A and B have the same apparent magnitude. They orbit each other with a period of 20 years and an eccentricity of 0.256. The pair are A-type main sequence stars with stellar classifications of A1 V. A magnitude 11.3 visual companion star, labelled component C, is located at an angular separation of 33.2 arc seconds along a position angle of 342°, as of 1999. Theta Piscis Austrini is moving through the Galaxy a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Upsilon Piscis Austrini
Upsilon Piscis Austrini (υ Piscis Austrini) is a solitary, orange-hued star in the southern constellation of Piscis Austrinus. It is faintly visible to the naked eye with an apparent visual magnitude of +4.98. Based upon an annual parallax shift of 7.69 mas as seen from the Earth, the star is located 420 light-years from the Sun. This is an evolved K-type giant star with a stellar classification of K4 III. It is catalogued as a member of the Wolf 630 moving group In astronomy, stellar kinematics is the Observational astronomy, observational study or measurement of the kinematics or motions of stars through space. Stellar kinematics encompasses the measurement of stellar Velocity, velocities in the Milky W .... Upsilon Piscis Austrini is moving through the galaxy at a speed of 36.4 km/s relative to the Sun. Its projected galactic orbit carries it between 17,700 and 25,400 light-years from the center of the galaxy. References {{DEFAULTSO ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tau Piscis Austrini
Tau Piscis Austrini (τ Piscis Austrini) is a solitary, yellow-white hued star in the southern constellation of Piscis Austrinus. It is visible to the naked eye with an apparent visual magnitude of +4.9. Based upon an annual parallax shift of 54.71 mas as seen from the Earth, the star is located 59.6 light years from the Sun. This is an F-type main sequence star with a stellar classification of F6 V. It is about 1.3 billion years old with a projected rotational velocity of 14 km/s and exhibits a low level of activity. The star has an estimated 1.34 times the mass of the Sun and 1.45 times the Sun's radius. It is radiating 2.82 times the solar luminosity from its photosphere at an effective temperature of 6,324 K. This star is a candidate for hosting a debris disk, as it displayed an initial near infrared excess that faded with further observations. Naming In Chinese, (), meaning '' Celestial Money'', refers to an asterism consisting of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mu Piscis Austrini
Mu Piscis Austrini, Romanization of Greek, Latinized from μ Piscis Austrini, is a solitary, white-hued star in the southern constellation of Piscis Austrinus. It is visible to the naked eye with an apparent visual magnitude of +4.49. Based upon an annual parallax shift of as seen from the Gaia space telescope, the star is located around light years from the Sun. This star has the spectrum of an A-type star, A-type subgiant star, subgiant with a stellar classification of A1.5 IVn. It is spinning rapidly with a projected rotational velocity of 308 km/s. This is giving the star an oblate spheroid, oblate shape with an equatorial bulge that is an estimated 23% larger than the polar radius. An X-ray astronomy, X-ray emission has been detected from this star with a luminosity of . This may be coming from an undiscovered companion, since A-type stars are not expected to be a significant source of X-rays. Mu Piscis Austrini is moving through the Galaxy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gamma Piscis Austrini
Gamma Piscis Austrini, Latinized from γ Piscis Austrini, is binary star system in the southern constellation of Piscis Austrinus. It is visible to the naked eye with a combined apparent visual magnitude of +4.448. As of 2010, the pair had an angular separation of 4 arc seconds along a position angle of 255°. Based upon an annual parallax shift of as seen from the Earth, the system is located about 203 light years from the Sun. The magnitude 4.59 primary, component A, is a white-hued, chemically peculiar A-type main sequence star with a stellar classification of . It is an estimated 214 million years old with 2.63 times the mass of the Sun. The fainter magnitude 8.20 companion, component B, is an F-type main sequence star with a class of F5 V. Gamma Piscis Austrini is moving through the Galaxy at a speed of 24.1 km/s relative to the Sun. Its projected Galactic orbit carries it between and from the center of the Galaxy. It came closes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iota Piscis Austrini
Iota Piscis Austrini (ι Piscis Austrini) is a solitary, blue-white hued star in the southern constellation of Piscis Austrinus. It has an apparent visual magnitude of +4.35 and is around 500 light years from the Sun. This is an A-type main sequence star with a stellar classification of A0 V. It has a magnitude 11.4 visual companion located at an angular separation of 20 arc seconds along a position angle of 290°, as of 1910. Iota Piscis Austrini is moving through the Galaxy at a speed of 29.7 km/s relative to the Sun. Its projected Galactic orbit carries it between 18,400 and 24,300 light years from the center of the Galaxy. Naming In Chinese, (), meaning '' Celestial Money'', refers to an asterism consisting of refers to an asterism consisting of ι Piscis Austrini 13 Piscis Austrini, θ Piscis Austrini, μ Piscis Austrini and τ Piscis Austrini. Consequently, the Chinese name Chinese names or Chinese personal names are names used by ind ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beta Piscis Austrini
Beta Piscis Austrini, Romanization of Greek, Latinized from β Piscis Austrini, is catalogued as a binary star system in the southern constellation of Piscis Austrinus. It is visible to the naked eye with an apparent visual magnitude of +4.29. Based upon an annual parallax shift of 22.84 milliarcsecond, mas as seen from the Earth, the star is located 143 light years from the Sun. These coordinates are a source of X-ray astronomy, X-ray emission with a luminosity of , which is most likely coming from a source other than the A-type stars. Oblak (1978) identified this as a triple star system, although subsequent sources list it as a binary. The magnitude 4.29 primary, component A, is a white-hued A-type main sequence star with a stellar classification of A1 V. It has an estimated 2.3 times the mass of the Sun and 2.1 times the Sun's radius. The star is radiating 37 times the solar luminosity from its photosphere at an effective temperature of 9,638 K ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delta Piscis Austrini
Delta Piscis Austrini, Latinized from δ Piscis Austrini, is a yellow-hued star in the southern constellation of Piscis Austrinus. It is visible to the naked eye with an apparent visual magnitude of +4.175. There is a magnitude 9.86 common proper motion companion located at an angular separation of 5.2 arc seconds – the pair most likely form a binary star system. Based upon an annual parallax shift of 18.9796 mas as seen from the Gaia satellite, Delta Piscis Austrini is located 172 ± 2 light-years from the Sun. The primary, component A, is an evolved G-type giant star with a stellar classification of G8 III. At the age of about 3.74 billion years it is a red clump star, which indicates it is generating energy through helium fusion at its core. The star has an estimated 1.42 times the mass of the Sun and it radiates 52 times the solar luminosity from its photosphere at an effective temperature of 4.828 K. Delta Piscis Austrini is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epsilon Piscis Austrini
Epsilon Piscis Austrini, Latinized from ε Piscis Austrini, is a blue-white hued star in the southern constellation of Piscis Austrinus. It is visible to the naked eye with an apparent visual magnitude of +4.17. Based upon an annual parallax shift of 8.0981 ± 0.3582 mas as seen from the GAIA satellite, the system is located roughly 400 light years from the Sun. This is a B-type main sequence star with a stellar classification of B8 Ve. It is a Be star that is spinning rapidly with a projected rotational velocity of 216 km/s, compared to an equatorial critical velocity of 301 km/s. The star has 4.1 times the mass of the Sun and is radiating 661 times the solar luminosity from its photosphere at an effective temperature of 11,066 K. Epsilon Piscis Austrini is moving through the Galaxy at a speed of 18.7 km/s relative to the Sun. Its projected Galactic orbit carries it between and from the center of the Galaxy. Naming In Chinese, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Variable Star
A variable star is a star whose brightness as seen from Earth (its apparent magnitude) changes with time. This variation may be caused by a change in emitted light or by something partly blocking the light, so variable stars are classified as either: * Intrinsic variables, whose luminosity actually changes; for example, because the star periodically swells and shrinks. * Extrinsic variables, whose apparent changes in brightness are due to changes in the amount of their light that can reach Earth; for example, because the star has an orbiting companion that sometimes eclipses it. Many, possibly most, stars have at least some variation in luminosity: the energy output of the Sun, for example, varies by about 0.1% over an 11-year solar cycle. Discovery An ancient Egyptian calendar of lucky and unlucky days composed some 3,200 years ago may be the oldest preserved historical document of the discovery of a variable star, the eclipsing binary Algol. Of the modern astronomers, th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
