AF Andromedae
Luminous blue variable star in the constellation Andromeda / From Wikipedia, the free encyclopedia
AF Andromedae (AF And) is a luminous blue variable (LBV), a type of variable star. The star is one of the most luminous variables in M31, the Andromeda Galaxy.
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Andromeda |
Right ascension | 00h 43m 33.086s[2] |
Declination | +41° 49′ 10.31″[2] |
Characteristics | |
Spectral type | LBV |
U−B color index | ~ −0.9[3] |
B−V color index | ~ +0.1[3] |
Variable type | LBV[4] |
Astrometry | |
Radial velocity (Rv) | −152±9[5] km/s |
Proper motion (μ) | RA: 0.088[2] mas/yr Dec.: −0.076[2] mas/yr |
Parallax (π) | −0.0026 ± 0.0674 mas |
Distance | ~2.5Mly ly (~780kpc pc) |
Absolute magnitude (MV) | −8.2[6] |
Details | |
Mass | 50-120[7] M☉ |
Radius | 63[4] R☉ |
Luminosity | 1,500,000[6] L☉ |
Temperature | 33,000±3,000 K (normal) 7,000 (outburst)[8] K |
Other designations | |
Database references | |
SIMBAD | data |
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