11 Andromedae
Star in the constellation Andromeda / From Wikipedia, the free encyclopedia
11 Andromedae, abbreviated 11 And, is a single,[10] orange-hued star in the northern constellation of Andromeda. 11 Andromedae is the Flamsteed designation. It has an apparent visual magnitude of 5.44,[2] which is bright enough to be faintly visible to the naked eye. An annual parallax shift of 11.5 mas[1] yields a distance estimate of 283 light years. It is moving further from the Earth with a heliocentric radial velocity of +10 km/s.[1]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Andromeda |
Right ascension | 23h 19m 29.80701s[1] |
Declination | +48° 37′ 31.1615″[1] |
Apparent magnitude (V) | 5.44[2] |
Characteristics | |
Spectral type | K0 III[3] |
U−B color index | +0.82[4] |
B−V color index | +1.014±0.003[2] |
Astrometry | |
Radial velocity (Rv) | +9.99±0.14[1] km/s |
Proper motion (μ) | RA: +22.597[1] mas/yr Dec.: +52.689[1] mas/yr |
Parallax (π) | 11.5097 ± 0.0858 mas[1] |
Distance | 283 ± 2 ly (86.9 ± 0.6 pc) |
Absolute magnitude (MV) | 0.73[2] |
Details | |
Mass | 2.57[5] M☉ |
Radius | 12[6] R☉ |
Luminosity | 62.86[2] L☉ |
Surface gravity (log g) | 2.61[5] cgs |
Temperature | 4,874[5] K |
Metallicity [Fe/H] | −0.13±0.07[7] dex |
Rotational velocity (v sin i) | 1.0[8] km/s |
Other designations | |
Database references | |
SIMBAD | data |
This is an evolved giant star with a stellar classification of K0 III,[3] which means it has exhausted the supply of hydrogen at its core and turned off the main sequence. It has an estimated 2.57[5] times the mass of the Sun and has expanded to around 12[6] times the Sun's radius. It is radiating 63[2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,874 km/s.[5]
Within Andromeda it is the south-west end of a bright northerly chain (jagged line) asterism – the others being, their order going with numbering, 8, 7, 5 and 3 Andromedae.