HD 110956
Star in the constellation Crux
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HD 110956 is a single[11] star in the southern constellation of Crux. It is faintly visible to the naked eye with an apparent visual magnitude of 4.62.[1] 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.[5] It is a probable member of the Lower Centaurus–Crux subgroup of the Scorpius–Centaurus association.[12]
Star map shows star position on the northern edge of the constellation Crux | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Crux[1] |
| Right ascension | 12h 46m 22.71460s[2] |
| Declination | −56° 29′ 19.7366″[2] |
| Apparent magnitude (V) | 4.62[1] |
| Characteristics | |
| Evolutionary stage | Main sequence[3] |
| Spectral type | B2/3V[4] |
| U−B color index | −0.61[1] |
| B−V color index | −0.150±0.003[1] |
| Astrometry | |
| Radial velocity (Rv) | 15.5[5] km/s |
| Proper motion (μ) | RA: −33.03[2] mas/yr Dec.: −14.84[2] mas/yr |
| Parallax (π) | 8.48±0.22 mas[2] |
| Distance | 385 ± 10 ly (118 ± 3 pc) |
| Absolute magnitude (MV) | −1.05[6] |
| Details | |
| Mass | 6.5[7] M☉ |
| Luminosity | 1,538[7] L☉ |
| Surface gravity (log g) | 4.24[8] cgs |
| Temperature | 19,055[7] K |
| Rotational velocity (v sin i) | 22±3[9] km/s |
| Age | 12.7[10] Myr |
| Other designations | |
| CPD−55°5215, FK5 3018, HD 110956, HIP 62327, HR 4848, SAO 240235 | |
| Database references | |
| SIMBAD | data |
This is a B-type main-sequence star with a stellar classification of B2/3V.[4] It is a young star, estimated to be about 12.7 million years old,[10] with 6.5 times the mass of the Sun.[7] The star is spinning with a projected rotational velocity of 22 km/s.[9] It is radiating around 1,500 times the luminosity of the Sun from its photosphere at an effective temperature of 19,055 K.[7]
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.[13] It is an α2 CVn variable with the designation BR Cru.[14]