| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| 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 mas [2] |
| 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]
- ^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
- ^ 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. S2CID 18759600.
- ^ a b 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, vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode: 1978mcts.book.....H
- ^ 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, S2CID 120898311
- ^ 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
- ^ 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: 1208.2037, Bibcode: 2012MNRAS.427..343M, doi: 10.1111/j.1365-2966.2012.21873.x, S2CID 118665352
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 | This variable star–related article is a stub. You can help Wikipedia by expanding it. |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| 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 mas [2] |
| 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]
- ^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 8 December 2021.
- ^ 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. S2CID 18759600.
- ^ a b 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, vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode: 1978mcts.book.....H
- ^ 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, S2CID 120898311
- ^ 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
- ^ 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: 1208.2037, Bibcode: 2012MNRAS.427..343M, doi: 10.1111/j.1365-2966.2012.21873.x, S2CID 118665352
| Stars |
| ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||
|
Star clusters |
| ||||||||||
| Nebulae |
| ||||||||||
| Galaxies |
| ||||||||||
|
| This variable star–related article is a stub. You can help Wikipedia by expanding it. |