Astronomy:HD 165493

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Short description
Star in the constellation Ara
HD 165493
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
Distanceapprox. 900 ly
(approx. 270 pc)
Details
HD 165493 A
Mass3.98±0.10[2] M
Luminosity457[2] L
Temperature12,250[2] K
Other designations
CD-45 12215, HD 165493, HIP 88859, HR 6759, SAO 228734, WDS J18085-4546AB.
Database references
SIMBADdata

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. 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. Bibcode2007A&A...474..653V. 
  2. 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. Bibcode2010AN....331..349H. 
  3. 3.0 3.1 Mason, B. D. et al. (2014), The Washington Visual Double Star Catalog, doi:10.1086/323920, Bibcode2001AJ....122.3466M, http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/wds, retrieved 2015-07-22 
  4. 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, Bibcode1978A&AS...34....1N 
  5. 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. Bibcode2006AstL...32..759G. 

External links