Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Andromeda |
Right ascension | 02h 17m 32.96122s[2] |
Declination | +44° 18′ 17.7573″[2] |
Apparent magnitude (V) | 6.7 – 14.6[3] |
Characteristics | |
Spectral type | S6,1e-S9,2e[3] |
Variable type | Mira[3] |
Astrometry | |
Radial velocity (Rv) | −38.19±0.4[4] km/s |
Proper motion (μ) | RA: −0.162[2] mas/yr Dec.: −2.516[2] mas/yr |
Parallax (π) | 2.2125 ± 0.0953 mas[2] |
Distance | 1,470 ± 60 ly (450 ± 20 pc) |
Absolute magnitude (MV) | −5.27[5] |
Details | |
Mass | 5.6[6] M☉ |
Luminosity | 8,394[7] L☉ |
Surface gravity (log g) | −0.61[6] cgs |
Temperature | 3,030[6] K |
Metallicity [Fe/H] | 0.003[6] dex |
Other designations | |
Database references | |
SIMBAD | data |
W Andromedae is a variable star in the constellation of Andromeda. It is classified as a Mira variable and S-type star,[8] and varies from an apparent visual magnitude of 14.6 at minimum brightness to a magnitude of 6.7 at maximum brightness, with a period of approximately 397.3 days.[3] The star is losing mass due to stellar winds at a rate of 2.79×10−7 M☉/yr.[5]
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