Astronomy:HD 165493
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Short description: Star in the constellation Ara
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Ara |
| Right ascension | 18h 08m 30.10807s[1] |
| Declination | −45° 46′ 01.2534″[1] |
| Apparent magnitude (V) | 6.153[2] (6.15 + 9.55)[3] |
| Characteristics | |
| Spectral type | B7.5II[2] |
| U−B color index | −0.49[4] |
| B−V color index | −0.08[4] |
| Astrometry | |
| Radial velocity (Rv) | −35.0±4.3[5] km/s |
| Proper motion (μ) | RA: −2.88[1] mas/yr Dec.: −17.29[1] mas/yr |
| Parallax (π) | 3.68 ± 0.60[1] mas |
| Distance | approx. 900 ly (approx. 270 pc) |
| Details | |
| HD 165493 A | |
| Mass | 3.98±0.10[2] M☉ |
| Luminosity | 457[2] L☉ |
| Temperature | 12,250[2] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 165493 is double star in the southern constellation of Ara. As of 2011, the two components have an angular separation of 4″ along a position angle of 257°.[3]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 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.
- ↑ 2.0 2.1 2.2 2.3 2.4 Hohle, M. M.; Neuhäuser, R.; Schutz, B. F. (2010). "Masses and luminosities of O- and B-type stars and red supergiants". Astronomische Nachrichten 331 (4): 349. doi:10.1002/asna.200911355. Bibcode: 2010AN....331..349H.
- ↑ 3.0 3.1 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
- ↑ 4.0 4.1 Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series 34: 1–49, Bibcode: 1978A&AS...34....1N
- ↑ 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.
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