HD_165493 Knowpia

HD 165493
Observation data; Epoch J2000 Equinox J2000
Constellation	Ara
Right ascension	18h 08m 30.10807s
Declination	−45° 46′ 01.2534″
Apparent magnitude (V)	6.153 (6.15 + 9.55)
Characteristics
Spectral type	B7.5II
U−B color index	−0.49
B−V color index	−0.08
Astrometry
Radial velocity (Rv)	−35.0±4.3 km/s
Proper motion (μ)	RA: −2.88 mas/yr ; Dec.: −17.29 mas/yr
Parallax (π)	3.68 ± 0.60 mas
Distance	approx. 900 ly ; (approx. 270 pc)
Details
HD 165493 A
Mass	3.98±0.10 M☉
Luminosity	457 L☉
Temperature	12,250 K
Other designations
	CD-45 12215, HD 165493, HIP 88859, HR 6759, SAO 228734, WDS J18085-4546AB.
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 edit

^ ^a ^b ^c ^d ^e 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. S2CID 18759600.
^ ^a ^b ^c ^d ^e 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. S2CID 111387483.
^ ^a ^b Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22
^ ^a ^b 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. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.

Observation data Epoch J2000 Equinox J2000
Constellation	Ara
Right ascension	18^h 08^m 30.10807^s^[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 (R_v)	−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 mas^[1]
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
CD-45 12215, HD 165493, HIP 88859, HR 6759, SAO 228734, WDS J18085-4546AB.
Database references
SIMBAD	data