GR Andromedae

GR Andromedae

The visual band light curve of GR Andromedae, showing variation about the mean brightness. Adapted from Pyper et al. (2017)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension 00h 28m 28.5694s[2]
Declination +32° 26′ 15.8791″[2]
Apparent magnitude (V) 6.87 – 6.95 variable[3]
Characteristics
Spectral type A2pSrCrEu[3]
Apparent magnitude (B) 6.99[4]
Apparent magnitude (V) 6.91[4]
Apparent magnitude (G) 6.8449[2]
Apparent magnitude (J) 6.708[5]
Apparent magnitude (H) 6.765[5]
Apparent magnitude (K) 6.739[5]
Variable type α2 CVn[3]
Astrometry
Radial velocity (Rv)−18.2±0.7[6] km/s
Proper motion (μ) RA: −28.861±0.093 [2] mas/yr
Dec.: −20.308±0.070[2] mas/yr
Parallax (π)5.3516 ± 0.0704 mas[2]
Distance609 ± 8 ly
(187 ± 2 pc)
Absolute magnitude (MV)+0.88[7]
Details
Mass2.24[7] M☉
Radius2.24[8] R☉
Luminosity37[7] L☉
Surface gravity (log g)3[9] cgs
Temperature8,542[9] K
Metallicity [Fe/H]1[9] dex
Rotation518.2 days[1]
Rotational velocity (v sin i)< 6[8] km/s
Age525[7] Myr
Other designations
2MASS J00282858+3226159, BD+31 59, HD 2453, HIP 2243, SAO 53921, TYC 2266-725-1
Database references
SIMBADdata

GR Andromedae (often abbreviated to GR And) is a variable star in the constellation Andromeda. Its apparent visual magnitude varies between 6.87 and 6.95 in a cycle of 518.2 days.[1] It is classified as an α2 Canum Venaticorum variable.[3]

  1. ^ a b c Cite error: The named reference Pyper2017 was invoked but never defined (see the help page).
  2. ^ a b c d e f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  3. ^ a b c d Cite error: The named reference GCVS was invoked but never defined (see the help page).
  4. ^ a b "GR And". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved November 8, 2018.
  5. ^ a b c Cite error: The named reference 2MASS Cat was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference rv was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference kochukhov was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Catalano1990 was invoked but never defined (see the help page).
  9. ^ a b c Cite error: The named reference PASTEL was invoked but never defined (see the help page).