OP Andromedae

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OP Andromedae
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension 01h 36m 27.19997s[1]
Declination +48° 43′ 22.0010″[1]
Apparent magnitude (V) 6.27 - 6.41[2]
Characteristics
Spectral type K1III
B−V color index 1.21
Variable type RS Canum Venaticorum variable
Astrometry
Radial velocity (Rv) -42.67 ± 0.14 km/s
Proper motion (μ) RA: -16.08 ± 0.39[1] mas/yr
Dec.: -17.81 ± 0.37[1] mas/yr
Parallax (π) 6.36 ± 0.41[1] mas
Distance 510 ± 30 ly
(160 ± 10 pc)
Absolute magnitude (MV) 0.37 ± 0.23[3]
Details
Radius 16.1 ± 2.2[3] R
Luminosity 87 ± 20[3] L
Temperature 4400 [3] K
Other designations
BD+47° 460, HD 9746, HIP 7493, SAO 37351, HR 454.
Database references
SIMBAD data

OP Andromedae is a star in the constellation Andromeda. Varying between magnitudes 6.27 and 6.41 over 2.35 days, it has been classified as an RS Canum Venaticorum variable.[2] Unusually high levels of lithium have been detected in its spectrum.[3]

References[edit]

  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ^ a b Watson, Christopher (4 January 2010). "OP Andromedae". AAVSO Website. American Association of Variable Star Observers. Retrieved 17 July 2015. 
  3. ^ a b c d e Balachandran, Suchitra C.; Fekel, Francis C.; Henry, Gregory W.; Uitenbroek, Han (2000). "Two K Giants with Supermeteoritic Lithium Abundances: HDE 233517 and HD 9746". The Astrophysical Journal 542 (2): 978–88. Bibcode:2000ApJ...542..978B. doi:10.1086/317055.