Zeta Andromedae
Star system in the constellation Andromeda / From Wikipedia, the free encyclopedia
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Not to be confused with Z Andromedae.
Zeta Andromedae (Zeta And, ζ Andromedae, ζ And) is a star system in the constellation Andromeda. It is approximately 189 light-years from Earth.
Quick Facts Constellation, Right ascension ...
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Andromeda |
Right ascension | 00h 47m 20.32547s[1] |
Declination | +24° 16′ 01.8408″[1] |
Apparent magnitude (V) | 3.92 to 4.14[2] |
Characteristics | |
Spectral type | K1III + KV[3] |
U−B color index | +0.90[4] |
B−V color index | +1.12[4] |
R−I color index | +0.59[4] |
Variable type | ELL/RS[2] |
Astrometry | |
Radial velocity (Rv) | −24.43 ± 0.1[5] km/s |
Proper motion (μ) | RA: −101.17[1] mas/yr Dec.: −81.77[1] mas/yr |
Parallax (π) | 17.24 ± 0.26 mas[1] |
Distance | 189 ± 3 ly (58.0 ± 0.9 pc) |
Absolute magnitude (MV) | +0.14[3] |
Orbit[3] | |
Period (P) | 17.769426 |
Semi-major axis (a) | 2.7 R* |
Eccentricity (e) | 0.0 |
Inclination (i) | 65 ± 5° |
Details | |
Aa | |
Mass | 2.6 ± 0.4[3] M☉ |
Radius | 15.9 ± 0.8[6] R☉ |
Luminosity | 95.5[3] L☉ |
Surface gravity (log g) | 2.8[3] cgs |
Temperature | 4,665 ± 140[6] K |
Metallicity [Fe/H] | −0.30[3] dex |
Rotation | 17.77 days[7] |
Rotational velocity (v sin i) | 41.4 ± 0.2[3] km/s |
Ab | |
Mass | 0.75[3] M☉ |
Other designations | |
Database references | |
SIMBAD | data |
Close
Zeta Andromedae is the star's Bayer designation. It also has the Flamsteed designation 34 Andromedae and multiple other designations in stellar catalogues.