Omicron Pegasi

Omicron Pegasi
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Pegasus
Right ascension 22h 41m 45.40961s[1]
Declination +29° 18′ 27.4918″[1]
Apparent magnitude (V) +4.79[2]
Characteristics
Spectral type A1 IV[3]
U−B color index +0.035[4]
B−V color index -0.015[4]
Astrometry
Radial velocity (Rv)+8.50 ± 0.1 km/s
Proper motion (μ) RA: -0.06 ± 0.42[1] mas/yr
Dec.: –21.46 ± 0.49[1] mas/yr
Parallax (π)10.92 ± 0.67[1] mas
Distance300 ± 20 ly
(92 ± 6 pc)
Absolute magnitude (MV)-0.01[5]
Details
Surface gravity (log g)3.7[3] cgs
Temperature9,600[3] K
Metallicity [Fe/H]0.0[3] dex
Rotational velocity (v sin i)6.0±0.2[3] km/s
Other designations
43 Peg, BD+28 4436, HD 214994, HIP 112051, HR 8641, SAO 90717.[2]
Database references
SIMBADdata

Omicron Pegasi (ο Peg) is a star in the constellation Pegasus. Its apparent magnitude is 4.79. Located 300 ± 20 light-years distant,[1] it is a white subgiant of spectral class A1IV, which has begun to cool, expand and brighten off the main sequence.[5]

References

  1. 1 2 3 4 5 6 van Leeuwen, F. (November 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
  2. 1 2 SIMBAD, Omicron Pegasi (accessed 12 January 2013)
  3. 1 2 3 4 5 Gray, David F. (April 2014), "Precise Rotation Rates for Five Slowly Rotating a Stars", The Astronomical Journal, 147 (4): 13, Bibcode:2014AJ....147...81G, doi:10.1088/0004-6256/147/4/81, 81
  4. 1 2 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV data. Bibcode:1986EgUBV........0M.
  5. 1 2 Gray, David F. (2014). "Precise Rotation Rates for Five Slowly Rotating a Stars". The Astronomical Journal. 147 (4): 13. Bibcode:2014AJ....147...81G. doi:10.1088/0004-6256/147/4/81. 81.
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