OP Andromedae

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OP Andromedae
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension 01h 36m 27.200s[1]
Declination +48° 43′ 22.00″[1]
Apparent magnitude (V) 6.22
Characteristics
Spectral type K1III
B−V color index 1.21
Variable type BY Draconis
Astrometry
Radial velocity (Rv) -43.2 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) 7.47
Details
Mass 0.8 M
Radius 0.9 R
Luminosity 0.4 L
Temperature 3,500–5,000 K
Other designations
BD+47° 460, HD 9746, HIP 7493, SAO 37351, HR 454.
Database references
SIMBAD data

OP Andromedae is a variable star.

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