Astronomy:HD 158220
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Short description: Star in the constellation Ara
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Ara |
| Right ascension | 17h 31m 23.28387s[2] |
| Declination | −56° 55′ 15.4672″[2] |
| Apparent magnitude (V) | 5.95[3] |
| Characteristics | |
| Spectral type | B7II-III[4] |
| B−V color index | −0.08[3] |
| Variable type | Be star[5] |
| Astrometry | |
| Radial velocity (Rv) | -3[6] km/s |
| Proper motion (μ) | RA: −0.29[2] mas/yr Dec.: −3.72[2] mas/yr |
| Parallax (π) | 1.78 ± 0.34[2] mas |
| Distance | approx. 1,800 ly (approx. 600 pc) |
| Details | |
| Luminosity | 1,176[7] L☉ |
| Temperature | 9,657[7] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
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.[5]
References
- ↑ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html.
- ↑ 2.0 2.1 2.2 2.3 2.4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V.
- ↑ 3.0 3.1 Johnson, H. L. et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory 4 (99): 99, Bibcode: 1966CoLPL...4...99J
- ↑ 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
- ↑ 5.0 5.1 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, doi:10.1086/382246, Bibcode: 2004PASP..116..178P
- ↑ Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication (Carnegie Institute of Washington, D.C.), Bibcode: 1953GCRV..C......0W
- ↑ 7.0 7.1 McDonald, I. et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–57, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode: 2012MNRAS.427..343M
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