HD 158220

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HD 158220
Observation data
Epoch J2000      Equinox J2000
Constellation Ara
Right ascension 17h 31m 23.28387s[1]
Declination −56° 55′ 15.4672″[1]
Apparent magnitude (V) 5.95[2]
Spectral type B7II-III[3]
B−V color index −0.08[2]
Variable type Be star[4]
Radial velocity (Rv) -3[5] km/s
Proper motion (μ) RA: −0.29[1] mas/yr
Dec.: −3.72[1] mas/yr
Parallax (π) 1.78 ± 0.34[1] mas
Distance approx. 1,800 ly
(approx. 600 pc)
Luminosity 1,176[6] L
Temperature 9,657[6] K
Other designations
V862 Arae, CD-56° 6893, HD 158220, HIP 85751, HR 6505, SAO 244808.
Database references

HD 158220 is a giant Be star in the southern constellation of Ara. This is a pulsating variable star that changes brightness by an amplitude of 0.030 magnitude over a period of 1.15 days.[4]


  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. 
  2. ^ a b Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J 
  3. ^ Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H 
  4. ^ a b Percy, John R.; et al. (February 2004), "Short-Period Variable Be Stars Discovered or Confirmed through Self-Correlation Analysis of Hipparcos Epoch Photometry", The Publications of the Astronomical Society of the Pacific, 116 (816): 178–183, Bibcode:2004PASP..116..178P, doi:10.1086/382246 
  5. ^ Wilson, R. E. (1953), General Catalogue of Stellar Radial Velocities, Carnegie Institute of Washington, D.C., Bibcode:1953GCRV..C......0W 
  6. ^ a b McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037Freely accessible, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x 

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