PASTEL update on star parameters
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==Naming== |
==Naming== |
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In [[Chinese |
In [[Chinese astronomy|Chinese]], {{lang|zh|天大將軍}} ({{lang|zh-Latn|Tiān Dà Jiāng Jūn}}), meaning ''[[Bond (Chinese constellation)|Heaven's Great General]]'', refers to an asterism consisting of τ Andromedae, [[Gamma Andromedae|γ Andromedae]], [[Phi Persei|φ Persei]], [[51 Andromedae]], [[49 Andromedae]], [[Chi Andromedae|χ Andromedae]], [[Upsilon Andromedae|υ Andromedae]], [[56 Andromedae]], [[Beta Trianguli|β Trianguli]], [[Gamma Trianguli|γ Trianguli]] and [[Delta Trianguli|δ Trianguli]]. Consequently, the [[Chinese star names|Chinese name]] for τ Andromedae itself is {{lang|zh|天大將軍七}} ({{lang|zh-Latn|Tiān Dà Jiāng Jūn qī}}, {{lang-en|the Seventh Star of Heaven's Great General}}.).<ref>{{zh icon}} [http://aeea.nmns.edu.tw/2006/0607/ap060710.html AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年7月10日]</ref> |
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==References== |
==References== |
Location of τ Andromedae (circled) | |
Observation data Epoch J2000 Equinox J2000 | |
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Constellation | Andromeda |
Right ascension | 01h40m 34.81645s[1] |
Declination | +40° 34′ 37.3742″[1] |
Apparent magnitude (V) | +4.94[2] |
Characteristics | |
Spectral type | B5 III[3] |
U−B color index | -0.41[2] |
B−V color index | -0.09[2] |
Astrometry | |
Radial velocity (Rv) | -14[4] km/s |
Proper motion (μ) | RA: +15.99[1] mas/yr Dec.: -23.76[1] mas/yr |
Parallax (π) | 4.58 ± 0.25 mas[1] |
Distance | 710 ± 40 ly (220 ± 10 pc) |
Details | |
Luminosity | 851[5] L☉ |
Surface gravity (log g) | 3.357[6] cgs |
Temperature | 13,026[6] K |
Rotational velocity (v sin i) | 80[7] km/s |
Other designations | |
53 And, BD+39 378, HD 10205, HIP 7818, HR 477, SAO 37418.[8] | |
Database references | |
SIMBAD | data |
Tau Andromedae (τ And, τ Andromedae) is the Bayer designation for a star in the northern constellationofAndromeda. It has an apparent visual magnitude of +4.94,[2] which is bright enough to be viewed from dark suburban skies. From parallax measurements made during the Hipparcos mission, the distance to this star can be estimated as roughly 710 light-years (220 parsecs) from Earth. The brightness of this star is diminished by 0.24 in magnitude due to extinction caused by intervening gas and dust.[3]
The spectrum of this star matches a stellar classification of B5 III,[3] with the luminosity class of III indicating that this is a giant star. It is radiating about 851 times the luminosity of the Sun.[5]
InChinese, 天大將軍 (Tiān Dà Jiāng Jūn), meaning Heaven's Great General, refers to an asterism consisting of τ Andromedae, γ Andromedae, φ Persei, 51 Andromedae, 49 Andromedae, χ Andromedae, υ Andromedae, 56 Andromedae, β Trianguli, γ Trianguli and δ Trianguli. Consequently, the Chinese name for τ Andromedae itself is 天大將軍七 (Tiān Dà Jiāng Jūn qī, English: the Seventh Star of Heaven's Great General.).[9]
{{cite web}}
: CS1 maint: postscript (link)
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