Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Crux |
Right ascension | 12h 26m 37.561s[1] |
Declination | −62° 46′ 13.16″[1] |
Apparent magnitude (V) | 10.83[2] |
Characteristics | |
Spectral type | B1 Ia+[3] |
U−B color index | +0.42[2] |
B−V color index | +1.76[2] |
Variable type | Ellipsoidal + X-ray[4] |
Astrometry | |
Parallax (π) | 0.34 ± 0.75 mas[5] |
Distance | 3,040[2] pc |
Absolute magnitude (MV) | −7.47[3] |
Orbit | |
Period (P) | 41.498 days[2] |
Semi-major axis (a) | 0.00029" (191.7 R☉[6]) |
Eccentricity (e) | 0.462[2] |
Inclination (i) | 60[6]° |
Details | |
Mass | 43[3] M☉ |
Radius | 70[3] R☉ |
Luminosity (bolometric) | 470,000[3] L☉ |
Surface gravity (log g) | 2.38[3] cgs |
Temperature | 18,100[3] K |
Rotational velocity (v sin i) | 55[3] km/s |
Other designations | |
Database references | |
SIMBAD | data |
BP Crucis (x-ray source GX 301-2) is an X-ray binary system containing a blue hypergiant and a pulsar.
hipparcos
was invoked but never defined (see the help page).kaper
was invoked but never defined (see the help page).clark
was invoked but never defined (see the help page).gcvs
was invoked but never defined (see the help page).dr1
was invoked but never defined (see the help page).gravity
was invoked but never defined (see the help page).