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Star in the constellation Ara From Wikipedia, the free encyclopedia
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]
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 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 | |
Database references | |
SIMBAD | data |
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