11 Andromedae

Not to be confused with Xi Andromedae or Andromeda II. For the galaxy Andromeda XI (Andromeda 11), see Andromeda XI.
11 Andromedae
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]
Distance283 ± 2 ly
(86.9 ± 0.6 pc)
Absolute magnitude (MV)0.73[2]
Details
Mass2.57[5] M☉
Radius12[6] R☉
Luminosity62.86[2] L☉
Surface gravity (log g)2.61[5] cgs
Temperature4,874[5] K
Metallicity [Fe/H]−0.13±0.07[7] dex
Rotational velocity (v sin i)1.0[8] km/s
Other designations
11 And, BD+47° 4110, GC 32476, HD 219945, HIP 115152, HR 8874, SAO 52907, PPM 64074[9]
Database references
SIMBADdata

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]

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.

  1. ^ a b c d e f g h Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Griffin1960 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference bsc1 was invoked but never defined (see the help page).
  5. ^ a b c d e Cite error: The named reference Liu2014 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference cadars2 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference gaspar2016 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference DeMedeiros2000 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).