HD 161988
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Apus |
| Right ascension | 17h 57m 41.687s[1] |
| Declination | −76° 10′ 40.62″[1] |
| Apparent magnitude (V) | 6.07[2] |
| Characteristics | |
| Spectral type | K2III[3] |
| U−B color index | +1.28[2] |
| B−V color index | +1.20[2] |
| Astrometry | |
| Radial velocity (Rv) | +36.8[4] km/s |
| Proper motion (μ) | RA: 1.97±0.28[1] mas/yr Dec.: −1.73±0.27[1] mas/yr |
| Parallax (π) | 5.38 ± 0.31[1] mas |
| Distance | 610 ± 30 ly (190 ± 10 pc) |
| Absolute magnitude (MV) | 7.296 |
| Details | |
| Luminosity | 185[5] L☉ |
| Temperature | 4,498[5] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 161988 is star in the southern constellation of Apus.
References
- 1 2 3 4 5 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
- 1 2 3 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
- ↑ 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
- ↑ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
- 1 2 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
External links
| ||||||||||||||||||||||||||||||||||||||||||||||
This article is issued from Wikipedia - version of the Saturday, August 29, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.