Observation data Epoch J2000 Equinox J2000 |
|
---|---|
Constellation | Orion |
Right ascension | 05h 35m 08.27761s[1] |
Declination | +09° 56′ 02.9611″[1] |
Apparent magnitude (V) | 3.54 / 5.61[2] |
Characteristics | |
Spectral type | O8 III + B0.5 V[2] |
U−B color index | –1.01 / –0.77[2] |
B−V color index | –0.21 / +0.04[2] |
Astrometry | |
Radial velocity (Rv) | +33.5 km/s |
Proper motion (μ) | RA: –0.34[1] mas/yr Dec.: –2.94[1] mas/yr |
Parallax (π) | 2.97 ± 0.55[1] mas |
Distance | approx. 1,100 ly (approx. 340 pc) |
Absolute magnitude (MV) | –4.25 / -1.94 |
Details | |
Meissa A | |
Mass | 27.9 ± 3.3[3] M☉ |
Radius | 10.0[4] R☉ |
Surface gravity (log g) | 4.0[4] cgs |
Temperature | 35,046 ± 454[4] K |
Age | 3.0 ± 0.8[3] Myr |
Other designations | |
Database references | |
SIMBAD | data |