HD 165493
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| 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 2 3 4 5 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.
- 1 2 3 4 5 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. arXiv:1003.2335. Bibcode:2010AN....331..349H. doi:10.1002/asna.200911355.
- 1 2 Mason, B. D.; et al. (2014), The Washington Visual Double Star Catalog, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22
- 1 2 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. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
External links
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