Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Andromeda |
Right ascension | 23h 27m 07.40s[2] |
Declination | +42° 54′ 43.2″[2] |
Apparent magnitude (V) | 5.75[3] |
Characteristics | |
Spectral type | B9 III or B9 Mn[4] |
B−V color index | −0.007±0.004[3] |
Variable type | α2 CVn[5] |
Astrometry | |
Radial velocity (Rv) | −8.1±1.6[6] km/s |
Proper motion (μ) | RA: 87.05[2] mas/yr Dec.: 16.54[2] mas/yr |
Parallax (π) | 10.87 ± 0.30 mas[2] |
Distance | 300 ± 8 ly (92 ± 3 pc) |
Absolute magnitude (MV) | 0.98[7] |
Details | |
Luminosity | 42.89[3] L☉ |
Rotational velocity (v sin i) | 75[8] km/s |
Age | 345[7] Myr |
Other designations | |
Database references | |
SIMBAD | data |
13 Andromedae, abbreviated 13 And, is a single,[10] blue-white hued variable star[5] in the northern constellation of Andromeda. 13 Andromedae is the Flamsteed designation, while it bears the variable star designation V388 Andromedae. With a typical apparent visual magnitude of around 5.75,[3] it is dimly visible to the naked eye under good seeing conditions. The distance to this star can be directly estimated from its annual parallax shift of 10.9 mas,[2] yielding a range of 300 light years. At that distance, its brightness is diminished by an extinction of 0.13 magnitude due to interstellar dust.[7] The star is moving closer to the Earth with a heliocentric radial velocity of −8 km/s.[6]
This is a magnetic chemically peculiar star that has been assigned stellar classifications of B9 III or B9 Mn.[4] It is a variable star of the Alpha2 Canum Venaticorum type, ranging in magnitude from 5.73 down to 5.77[5] with a period of 1.47946 days.[4] The star has a high rate of spin, showing a projected rotational velocity of 75 km/s.[8] 13 Andromedae is around 345[7] million years old and shines with 43[3] times the Sun's luminosity.
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