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Star in the constellation Crux From Wikipedia, the free encyclopedia
HD 110956 is a single[10] star in the southern constellation of Crux. It is faintly visible to the naked eye with an apparent visual magnitude of 4.62.[2] The distance to this star is approximately 385 light years based on parallax and it is drifting further away with a radial velocity of 15.5 km/s.[4] It is a probable member of the Lower Centaurus–Crux subgroup of the Scorpius–Centaurus association.[11]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Crux |
Right ascension | 12h 46m 22.71460s[1] |
Declination | −56° 29′ 19.7366″[1] |
Apparent magnitude (V) | 4.62[2] |
Characteristics | |
Evolutionary stage | Main sequence |
Spectral type | B2/3V[3] |
U−B color index | −0.61[2] |
B−V color index | −0.150±0.003[2] |
Astrometry | |
Radial velocity (Rv) | 15.5[4] km/s |
Proper motion (μ) | RA: −33.03[1] mas/yr Dec.: −14.84[1] mas/yr |
Parallax (π) | 8.48 ± 0.22 mas[1] |
Distance | 385 ± 10 ly (118 ± 3 pc) |
Absolute magnitude (MV) | −1.05[5] |
Details | |
Mass | 6.0±0.1[6] M☉ |
Luminosity | 402[7] L☉ |
Surface gravity (log g) | 4.24[8] cgs |
Temperature | 16,780[9] K |
Rotational velocity (v sin i) | 22±3[9] km/s |
Age | 8.2±1.8[6] Myr |
Other designations | |
Database references | |
SIMBAD | data |
This is a B-type main-sequence star with a stellar classification of B2/3V.[3] It is a young star, estimated to be about 8 million years old, with six times the mass of the Sun.[6] The star is spinning with a projected rotational velocity of 22 km/s.[9] It is radiating around 400[7] times the luminosity of the Sun from its photosphere at an effective temperature of 16,780 K.[9]
There are multiple visual companions positioned near HD 110956. The brightest of these, with a visual magnitude of 8.93, is located at an angular separation of 51.1″ along a position angle of 166°, as of 2020. This companion was reported by J. F. W. Herschel in 1834.[12] It is an α2 CVn variable with the designation BR Cru.[13]
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