| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ara |
| Right ascension | 17h 27m 12.46093s [1] |
| Declination | −50° 37′ 49.3379″ [1] |
| Apparent magnitude (V) | 5.905 [2] |
| Characteristics | |
| Spectral type | B9II [3] |
| U−B color index | +0.055 [4] |
| B−V color index | +0.105 [4] |
| Astrometry | |
| Radial velocity (Rv) | +11.0 [5] km/s |
| Proper motion (μ) |
RA: +0.19
[1]
mas/
yr Dec.: −2.53 [1] mas/ yr |
| Parallax (π) | 1.10 ± 0.38 mas [1] |
| Distance | approx. 3,000
ly (approx. 900 pc) |
| Details | |
| Mass | 7.87±1.68 [2] M☉ |
| Luminosity | 8,214 [2] L☉ |
| Temperature | 10,650 [2] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 157662 is a bright giant star in the southern constellation of Ara. It has a magnitude 10.91 companion at an angular separation of 76.4 ″ along a position angle of 159°. [6]
References
- ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv: 0708.1752. Bibcode: 2007A&A...474..653V. doi: 10.1051/0004-6361:20078357. S2CID 18759600.
- ^ a b c d Hohle, M. M.; et al. (April 2010), "Masses and luminosities of O- and B-type stars and red supergiants", Astronomische Nachrichten, 331 (4): 349, arXiv: 1003.2335, Bibcode: 2010AN....331..349H, doi: 10.1002/asna.200911355, S2CID 111387483
- ^ Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode: 1978mcts.book.....H
- ^ a b Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode: 1986EgUBV........0M
- ^ Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication, Carnegie Institute of Washington, D.C., Bibcode: 1953GCRV..C......0W
- ^ Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466, Bibcode: 2001AJ....122.3466M, doi: 10.1086/323920, retrieved 2015-07-22
External links
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 | This giant-star-related article is a stub. You can help Wikipedia by expanding it. |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ara |
| Right ascension | 17h 27m 12.46093s [1] |
| Declination | −50° 37′ 49.3379″ [1] |
| Apparent magnitude (V) | 5.905 [2] |
| Characteristics | |
| Spectral type | B9II [3] |
| U−B color index | +0.055 [4] |
| B−V color index | +0.105 [4] |
| Astrometry | |
| Radial velocity (Rv) | +11.0 [5] km/s |
| Proper motion (μ) |
RA: +0.19
[1]
mas/
yr Dec.: −2.53 [1] mas/ yr |
| Parallax (π) | 1.10 ± 0.38 mas [1] |
| Distance | approx. 3,000
ly (approx. 900 pc) |
| Details | |
| Mass | 7.87±1.68 [2] M☉ |
| Luminosity | 8,214 [2] L☉ |
| Temperature | 10,650 [2] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 157662 is a bright giant star in the southern constellation of Ara. It has a magnitude 10.91 companion at an angular separation of 76.4 ″ along a position angle of 159°. [6]
References
- ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv: 0708.1752. Bibcode: 2007A&A...474..653V. doi: 10.1051/0004-6361:20078357. S2CID 18759600.
- ^ a b c d Hohle, M. M.; et al. (April 2010), "Masses and luminosities of O- and B-type stars and red supergiants", Astronomische Nachrichten, 331 (4): 349, arXiv: 1003.2335, Bibcode: 2010AN....331..349H, doi: 10.1002/asna.200911355, S2CID 111387483
- ^ Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode: 1978mcts.book.....H
- ^ a b Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode: 1986EgUBV........0M
- ^ Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication, Carnegie Institute of Washington, D.C., Bibcode: 1953GCRV..C......0W
- ^ Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466, Bibcode: 2001AJ....122.3466M, doi: 10.1086/323920, retrieved 2015-07-22
External links
| Stars |
| ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||
|
Star clusters |
| ||||||||||
| Nebulae |
| ||||||||||
| Galaxies |
| ||||||||||
|
| This giant-star-related article is a stub. You can help Wikipedia by expanding it. |