65 Andromedae

65 Andromedae
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension 02h 25m 37.42608s[1]
Declination +50° 16′ 43.0815″[1]
Apparent magnitude (V) 4.734[2]
Characteristics
Evolutionary stage giant
Spectral type K4.5 III[3]
B−V color index 1.532±0.009[4]
Astrometry
Radial velocity (Rv)−4.93±0.20[5] km/s
Proper motion (μ) RA: +22.399[1] mas/yr
Dec.: −15.628[1] mas/yr
Parallax (π)7.4603 ± 0.2285 mas[1]
Distance440 ± 10 ly
(134 ± 4 pc)
Absolute magnitude (MV)−1.10[6]
Details
Mass1.63[7] M☉
Radius47[8] R☉
Luminosity372[7] L☉
Surface gravity (log g)1.650[2] cgs
Temperature3,927±24[7] K
Metallicity [Fe/H]−0.210[2] dex
Age3.01[7] Gyr
Other designations
65 And, BD+49° 656, FK5 2165, HD 14872, HIP 11313, HR 699, SAO 23319, PPM 27605, WDS J02256+5017A[9]
Database references
SIMBADdata

65 Andromedae, abbreviated 65 And, is a single,[10] orange-hued star in the northern constellation of Andromeda. With an apparent magnitude of 4.73,[2] it is visible to the naked eye. The distance to 65 And can be derived from its annual parallax shift of 7.5 mas,[1] which yields a range of around 440 light years. At that distance, its brightness is relatively lowered primarily by the inverse square law but also by an extinction of 0.16 magnitude due to interstellar dust.[11] The star is moving closer to the Earth with a heliocentric radial velocity of −5 km/s.[5]

This is a mildly iron-deficient[12] giant star with a stellar classification of K4.5 III,[3] which indicates that, at the age of three billion years,[7] is an evolved star that has exhausted the hydrogen at its core and expanded its radius. The measured angular diameter of this star, after correction for limb darkening, is 3.28±0.06 mas.[13] At the estimated distance of this star, this yields a physical size of about 47 times the radius of the Sun.[8] The star has 1.6[7] times the mass of the Sun and is radiating 372[7] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 3,927 K.[7]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference PASTEL was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Keenan1989 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Luck2007 was invoked but never defined (see the help page).
  7. ^ a b c d e f g h Cite error: The named reference Luck2015 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference lang2006 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Famaey2005 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference KrempecKrygier1991 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Richichi2005 was invoked but never defined (see the help page).