  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 23h 20m 53.26361s[1] |
| Declination | +38° 10′ 56.3671″[1] |
| Apparent magnitude (V) | 5.87[2] |
| Characteristics | |
| Spectral type | F5 V[2][3] |
| B−Vcolor index | 0.45[4] |
| Astrometry | |
| Radial velocity (Rv) | −10.5±0.3[5] km/s |
| Proper motion (μ) | RA: 130.117(34)[1]mas/yr Dec.: −58.960(33)[1]mas/yr |
| Parallax (π) | 23.7806±0.0361 mas[1] |
| Distance | 137.2 ± 0.2 ly (42.05 ± 0.06 pc) |
| Absolute magnitude (MV) | 2.66[3] |
| Details | |
| Mass | 1.25[6] M☉ |
| Luminosity | 7.38[3] L☉ |
| Surface gravity (log g) | 3.92±0.14[6] cgs |
| Temperature | 6,454±219[6] K |
| Metallicity[Fe/H] | +0.00[7] dex |
| Rotational velocity (v sin i) | 12[4] km/s |
| Age | 2.548[6] Gyr |
| Other designations | |
| 12 And,BD+37°4817,FK5 1610,HD 220117,HIP 115280,HR 8885,SAO 73190,PPM 88745,WDS J23209+3811A[8] | |
| Database references | |
| SIMBAD | data |
12 Andromedae is a single[2]star in the northernconstellation ofAndromeda. Thedesignation is from the star catalogue of English astronomerJohn Flamsteed, first published in 1712. It has anapparent visual magnitude of 5.87,[2] which indicates it is just visible to the naked eye under good seeing conditions. An annualparallax shift of 23.7806[1] mas provides a distance estimate of 137 light years. The star is moving closer to the Sun with aradial velocity of −10.5 km/s.[5]
This is an ordinaryF-type main-sequence star with astellar classification of F5 V.[2] It is about 2.5[6] billion years old and is spinning with aprojected rotational velocity of 12 km/s.[4] The abundance of iron is similar to that in the Sun.[7] The star has an estimated 1.25[6] times themass of the Sun and is radiating just over 7[3] times theSun's luminosity from itsphotosphere at aneffective temperature of around 6,454 K.[6]
