12 Andromedae

12 Andromedae
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−V color 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]
Distance137.2 ± 0.2 ly
(42.05 ± 0.06 pc)
Absolute magnitude (MV)2.66[3]
Details
Mass1.25[6] M☉
Luminosity7.38[3] L☉
Surface gravity (log g)3.92±0.14[6] cgs
Temperature6,454±219[6] K
Metallicity [Fe/H]+0.00[7] dex
Rotational velocity (v sin i)12[4] km/s
Age2.548[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
SIMBADdata

12 Andromedae is a single[2] star in the northern constellation of Andromeda. The designation is from the star catalogue of English astronomer John Flamsteed, first published in 1712. It has an apparent visual magnitude of 5.87,[2] which indicates it is just visible to the naked eye under good seeing conditions. An annual parallax shift of 23.7806[1] mas provides a distance estimate of 137 light years. The star is moving closer to the Sun with a radial velocity of −10.5 km/s.[5]

This is an ordinary F-type main-sequence star with a stellar classification of F5 V.[2] It is about 2.5[6] billion years old and is spinning with a projected 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 the mass of the Sun and is radiating just over 7[3] times the Sun's luminosity from its photosphere at an effective temperature of around 6,454 K.[6]

  1. ^ a b c d e f Cite error: The named reference Gaia EDR3 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Takeda2005 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ a b c d e f g Cite error: The named reference David2015 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Takeda2007 was invoked but never defined (see the help page).
  8. ^ "12 And". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-02-01.