LN Andromedae

LN Andromedae

A light curve for LN Andromedae, plotted from Hipparcos data[1]
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Andromeda
LN Andromedae A
Right ascension 23h 02m 45.14786s[2]
Declination +44° 03′ 31.4984″[2]
Apparent magnitude (V) 6.37[3]
LN Andromedae B
Right ascension 23h 02m 45.60328s[4]
Declination +44° 03′ 37.2673″[4]
Apparent magnitude (V) 9.88[5]
Characteristics
A
Spectral type B2V[6]
Apparent magnitude (U) 5.8[7]
Apparent magnitude (B) 6.377[8]
Apparent magnitude (J) 6.368[9]
Apparent magnitude (H) 6.482[9]
Apparent magnitude (K) 6.496[9]
Variable type SPB?[10]
B
Spectral type A1V[11]
Astrometry
LN Andromedae A
Radial velocity (Rv)−11.30±0.1[12] km/s
Proper motion (μ) RA: 0.441±0.019[2] mas/yr
Dec.: −5.799±0.027[2] mas/yr
Parallax (π)2.1847 ± 0.0280 mas[2]
Distance1,490 ± 20 ly
(458 ± 6 pc)
Absolute magnitude (MV)−1.66[13]
LN Andromedae B
Proper motion (μ) RA: 0.238±0.012[4] mas/yr
Dec.: −5.813±0.016[4] mas/yr
Parallax (π)2.2005 ± 0.0182 mas[4]
Distance1,480 ± 10 ly
(454 ± 4 pc)
Details
A
Mass6.5[14] M☉
Radius3.1[15] R☉
Luminosity608[15] L☉
Surface gravity (log g)3.94±0.13[14] cgs
Temperature18090±730[14] K
Metallicity [Fe/H]−0.23[16] dex
Rotational velocity (v sin i)8±4[14] km/s
Age9.5±4.8[17] Myr
B
Mass2.1[16] M☉
Radius2.0[18] R☉
Luminosity13[19] L☉
Surface gravity (log g)4.1[16] cgs
Temperature9,843[16] K
Metallicity [Fe/H]−0.33[16] dex
Other designations
2MASS J23024514+4403314, HR 8768, BD+43°4378, HD 217811, SAO 52626, PPM 63745, HIP 113802, WDS J23028+4404AB
Database references
SIMBADdata

LN Andromedae (LN And), also known as HD 217811, HR 8768, is a formerly suspected variable star[6] in the constellation Andromeda. Located approximately 458 parsecs (1,490 ly) away from Earth,[2] it shines with an apparent visual magnitude 6.41, thus it can be seen by the naked eye under very favourable conditions. Its spectral classification is B2V, meaning that it's a hot main sequence star, emitting light approximately with a blackbody spectrum at an effective temperature of 18,090 K.[14]

  1. ^ Cite error: The named reference CDS was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference Gaia EDR3 for A was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference koen was invoked but never defined (see the help page).
  4. ^ a b c d e Cite error: The named reference Gaia EDR3 for B was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference SIMBAD2 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference GCVS was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Reed2003 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ a b c Cite error: The named reference 2MASS Cat was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference vsx was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference lutz1977 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Gontcharov was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference jakate was invoked but never defined (see the help page).
  14. ^ a b c d e Cite error: The named reference Lyubimkov2013 was invoked but never defined (see the help page).
  15. ^ a b Cite error: The named reference tic was invoked but never defined (see the help page).
  16. ^ a b c d e Cite error: The named reference starhorse was invoked but never defined (see the help page).
  17. ^ Cite error: The named reference Tezlaff2011 was invoked but never defined (see the help page).
  18. ^ Cite error: The named reference ticv8 was invoked but never defined (see the help page).
  19. ^ Cite error: The named reference dr2b was invoked but never defined (see the help page).