Astronomy:HD 165493
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Short description: Star in the constellation Ara
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Ara[1] |
| Right ascension | 18h 08m 30.10807s[2] |
| Declination | −45° 46′ 01.2534″[2] |
| Apparent magnitude (V) | 6.153[3] (6.15 + 9.55)[4] |
| Characteristics | |
| Spectral type | B7.5II[3] |
| U−B color index | −0.49[5] |
| B−V color index | −0.08[5] |
| Astrometry | |
| Radial velocity (Rv) | −35.0±4.3[6] km/s |
| Proper motion (μ) | RA: −2.88[2] mas/yr Dec.: −17.29[2] mas/yr |
| Parallax (π) | 3.68 ± 0.60[2] mas |
| Distance | approx. 900 ly (approx. 270 pc) |
| Absolute magnitude (MV) | −0.97[1] |
| Details | |
| HD 165493 A | |
| Mass | 4.2[7] M☉ |
| Radius | 5.4[7] R☉ |
| Luminosity | 521[7] L☉ |
| Surface gravity (log g) | 3,58[7] cgs |
| Temperature | 12,849[7] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
| B | |
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°.[4]
References
- ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A XHIP 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 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.
- ↑ 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
- ↑ 5.0 5.1 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.
- ↑ 7.0 7.1 7.2 7.3 7.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
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