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Star in the constellation Andromeda From Wikipedia, the free encyclopedia
10 Andromedae, abbreviated 10 And, is an astrometric binary[3] star system in the northern constellation of Andromeda. 10 Andromedae is the Flamsteed designation. It has an apparent visual magnitude of approximately 5.81,[2] which means it is faintly visible to the naked eye. Based upon an annual parallax shift of 6.6 mas,[1] it is located 492 light years away. The system is moving toward the Earth with a heliocentric radial velocity of −1.1 km/s.[4]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Andromeda |
Right ascension | 23h 19m 52.42304s[1] |
Declination | +42° 04′ 41.0734″[1] |
Apparent magnitude (V) | 5.81[2] |
Characteristics | |
Spectral type | M0 III[3][2] |
B−V color index | 1.512±0.007[2] |
Astrometry | |
Radial velocity (Rv) | −1.1±0.3[4] km/s |
Proper motion (μ) | RA: +42.417[1] mas/yr Dec.: +4.900[1] mas/yr |
Parallax (π) | 6.6282 ± 0.0851 mas[1] |
Distance | 492 ± 6 ly (151 ± 2 pc) |
Details | |
Radius | 33[5] R☉ |
Luminosity | 258.78[2] L☉ |
Other designations | |
Database references | |
SIMBAD | data |
The visible component is an aging red giant star with a stellar classification of M0 III,[2] which indicates it has consumed the hydrogen at its core and evolved off the main sequence. The measured angular diameter of this star, after correction for limb darkening, is 2.01±0.02 mas.[7] At the estimated distance of 10 And, this yields a physical size of about 33 times the radius of the Sun.[5] It is radiating 259[2] times the Sun's luminosity from its enlarged photosphere.
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