Astronomy:HD 156091
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Short description: Double star in the constellation Ara
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Ara[1] |
| Right ascension | 17h 19m 12.50730s[2] |
| Declination | −59° 41′ 40.5989″[2] |
| Apparent magnitude (V) | 5.91[3] (5.91 + 13.00)[4] |
| Characteristics | |
| Spectral type | K2 IIICNIB/II[5] |
| B−V color index | 1.37[3] |
| Astrometry | |
| Radial velocity (Rv) | −5.0±0.4[6] km/s |
| Proper motion (μ) | RA: −3.15[2] mas/yr Dec.: −8.05[2] mas/yr |
| Parallax (π) | 1.31 ± 0.36[2] mas |
| Distance | approx. 2,500 ly (approx. 800 pc) |
| Absolute magnitude (MV) | −0.11[7] |
| Details | |
| Mass | 8.4±1.0[8] M☉ |
| Luminosity | 4,266[9] L☉ |
| Temperature | 4,306[9] K |
| Age | 33.7±8.6[8] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 156091 is a double star in the southern constellation of Ara. The primary is a sixth magnitude giant star with stronger than normal lines of carbon, nitrogen, and barium in its spectrum.[10] The companion is a 13th magnitude star at an angular separation of 27.4″ along a position angle of 275°, as of 2000.[4]
References
- ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode: 1987PASP...99..695R Constellation record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
- ↑ 3.0 3.1 Corben, P. M.; Stoy, R. H. (1968), "Photoelectric Magnitudes and Colours for Bright Southern Stars", Monthly Notes of the Astronomical Society of Southern Africa 27: 11, Bibcode: 1968MNSSA..27...11C.
- ↑ 4.0 4.1 Mason, B. D. et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal 122 (6): 3466, doi:10.1086/323920, Bibcode: 2001AJ....122.3466M, http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/wds, retrieved 2015-07-22
- ↑ Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode: 1978mcts.book.....H.
- ↑ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G.
- ↑ Gontcharov, G. A. (2011). "The red giant branch in the Tycho-2 catalogue". Astronomy Letters 37 (10): 707. doi:10.1134/S1063773711090040. Bibcode: 2011AstL...37..707G.
- ↑ 8.0 8.1 Tetzlaff, N. et al. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society 410 (1): 190–200, doi:10.1111/j.1365-2966.2010.17434.x, Bibcode: 2011MNRAS.410..190T.
- ↑ 9.0 9.1 McDonald, I. et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–57, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode: 2012MNRAS.427..343M.
- ↑ Keenan, Philip C.; Yorka, Sandra B.; Wilson, Olin C. (July 1987), "Recognition and classification of strong-CN giants", Publications of the Astronomical Society of the Pacific 99: 629–636, doi:10.1086/132025, Bibcode: 1987PASP...99..629K.
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