51 Andromedae
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Andromeda |
| Right ascension | 01h 37m 59.56s[1] |
| Declination | +48° 37′ 41.6″[1] |
| Apparent magnitude (V) | 3.57 |
| Characteristics | |
| Spectral type | K3III |
| U−B color index | 1.45 |
| B−V color index | 1.28 |
| Variable type | None |
| Astrometry | |
| Radial velocity (Rv) | 16.1 km/s |
| Proper motion (μ) | RA: 61.95 ± 0.17[1] mas/yr Dec.: -112.15 ± 0.17[1] mas/yr |
| Parallax (π) | 18.41 ± 0.18[1] mas |
| Distance | 177 ± 2 ly (54.3 ± 0.5 pc) |
| Absolute magnitude (MV) | 5.833 |
| Details | |
| Mass | 2.3[2] M☉ |
| Radius | 21.5 ± 0.9[3] R☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
51 Andromedae is a 4th magnitude star, the 5th brighest in the constellation Andromeda. It does not have a Bayer designation. It is occasionally called by the proper name Nembus[4] in Bayer's Uranometria (1603)[5] and Bode's star atlas Uranographia (1801).[6]
Ptolemy included this star in Andromeda in the Almagest, but it was moved into Perseus by Johann Bayer, who designated it Upsilon Persei (υ Per). Flamsteed moved it back, the International Astronomical Union agreed, and Flamsteed's 51 Andromedae is now its official designation.[7][8]
In Chinese, 天大將軍 (Tiān Dà Jiāng Jūn), meaning Heaven's Great General, refers to an asterism consisting of 51 Andromedae, γ Andromedae, φ Persei, 49 Andromedae, χ Andromedae, υ Andromedae, τ Andromedae, 56 Andromedae, β Trianguli, γ Trianguli and δ Trianguli.[9] Consequently, 51 Andromedae itself is known as 天大將軍三 (Tiān Dà Jiāng Jūn sān, English: the Third Star of Heaven's Great General.)[10]
51 Andromedae is an orange K-type giant with an apparent magnitude of +3.59. It is approximately 177 light years from the Earth.[1]
[edit] References
- ^ a b c d e f van Leeuwen, F. (2007). "HIP 7607". Hipparcos, the New Reduction. http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=7593. Retrieved 2010-04-02.
- ^ Gondoin, P. (December 1999), "Evolution of X-ray activity and rotation on G-K giants", Astronomy and Astrophysics 352: 217–227, Bibcode 1999A&A...352..217G
- ^ Nordgren, Tyler E. et al. (December 1999), "Stellar Angular Diameters of Late-Type Giants and Supergiants Measured with the Navy Prototype Optical Interferometer", The Astronomical Journal 118 (6): 3032-3038, Bibcode 1999AJ....118.3032N, doi:10.1086/301114
- ^ Allen, R. H. (1899). Star-names and Their Meanings. New York: G. E. Stechart., p.334.
- ^ Scans of the plates of Uranometria by J. Bayer, 1603 @Linda Hall Library
- ^ Scan of the plates of Uranographia by J.E. Bode, 1801 @Ian Ridpath's Star Tales
- ^ Allen, R. H. (1899). Star-names and Their Meanings. New York: G. E. Stechart., p.34.
- ^ Wagman, Morton (2003) Lost Stars p.240, McDonald and Woodward, Blacksburg, Virginia. ISBN 0-939923-78-5.
- ^ (Chinese) 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.
- ^ (Chinese) http://zh.wikipedia.org/zh-tw/%E5%A4%A9%E5%A4%A7%E5%B0%86%E5%86%9B%E4%B8%89
[edit] External links
- "HD 9927 -- Star". SIMBAD Astronomical Database. http://simbad.u-strasbg.fr/sim-id.pl?protocol=html&Ident=51+andromedae. Retrieved 2007-04-01.
- wikisky.org
- http://www.alcyone-software.com/cgi-bin/search.pl?object=HR0464
- Image 51 Andromedae
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