51 Andromedae
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Star 51 Andromedae |
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| AladinLite | |||||||||||||||||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Andromeda | ||||||||||||||||||
| Right ascension | 01 h 37 m 59.56 s | ||||||||||||||||||
| declination | + 48 ° 37 ′ 41.6 ″ | ||||||||||||||||||
| Apparent brightness | 3.57 likes | ||||||||||||||||||
| Typing | |||||||||||||||||||
| B − V color index | +1.28 | ||||||||||||||||||
| U − B color index | +1.45 | ||||||||||||||||||
| R − I index | +0.65 | ||||||||||||||||||
| Spectral class | K3 III | ||||||||||||||||||
| Astrometry | |||||||||||||||||||
| Radial velocity | (+16.15 ± 0.19) km / s | ||||||||||||||||||
| parallax | (18.76 ± 0.74) mas | ||||||||||||||||||
| distance | (174 ± 7) ly (53 ± 2) pc |
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| Proper movement | |||||||||||||||||||
| Rec. Share: | (+61.95 ± 0.17) mas / a | ||||||||||||||||||
| Dec. portion: | (−112.15 ± 0.17) mas / a | ||||||||||||||||||
| Physical Properties | |||||||||||||||||||
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Other names and catalog entries |
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51 Andromedae (proper name: Nembus , former name Ypsilon Persei ) is a bright K-type giant in the constellation Andromeda and is around 174 light years from Earth .
The star is already mentioned by Ptolemy in the Almagest and placed in the constellation Andromeda. In Johann Bayer's Uranometria from 1603, the star appears as υ Persei in the constellation of Perseus . The International Astronomical Union moved the celestial body back into the constellation Andromeda and John Flamsteed's designation 51 Andromedae prevailed. Both Johann Bayer and Johann Elert Bode use the name of the star as a nembus .
literature
- Johann Bayer : Uranometria , 1603, sheet 11 ( scans of an edition of Uranometria in the Linda Hall Library)
- Bode : Uranographia , 1801, plate IV ( scans of the plates in the Uranographia in Ian Ridpath's Star Tales )
Individual evidence
- ↑ a b c d Hipparcos catalog
- ↑ a b c SIMBAD database
- ↑ a b c Bright Star Catalog
- ↑ Famaey et al .: Local kinematics of K and M giants from CORAVEL / Hipparcos / Tycho-2 data. Revisiting the concept of superclusters. ; in: Astronomy and Astrophysics , Vol. 430, 2005, pp. 165ff. bibcode : 2005A & A ... 430..165F
- ↑ Morton Wagman: Lost Stars. P. 240, McDonald and Woodward, Blacksburg, Virginia 2003 ISBN 0-939923-78-5