Astronomy:HD 177808
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Short description: Star in the constellation Lyra
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Lyra |
| Right ascension | 19h 04m 57.87462s[1] |
| Declination | +31° 44′ 38.6538″[1] |
| Apparent magnitude (V) | 5.63[2] |
| Characteristics | |
| Spectral type | M0III[3] |
| B−V color index | 1.548±0.003[2] |
| Astrometry | |
| Radial velocity (Rv) | 3.47±0.14[2] km/s |
| Proper motion (μ) | RA: +74.989[1] mas/yr Dec.: −76.884[1] mas/yr |
| Parallax (π) | 5.9150 ± 0.0831[1] mas |
| Distance | 551 ± 8 ly (169 ± 2 pc) |
| Absolute magnitude (MV) | −0.75[2] |
| Details | |
| Radius | 42.27+1.26 −4.39[1] R☉ |
| Luminosity | 387.9±6.8[1] L☉ |
| Temperature | 3,940+233 −58[1] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 177808 is a 6th magnitude star in the constellation Lyra, approximately 610 light years away from Earth. It is a solitary[5] red giant star of the spectral type M0III, meaning it possesses a surface temperature of around 3,940 kelvins. It is therefore much larger and brighter than the Sun, yet cooler in comparison.
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ Roman, Nancy G. (December 1955), "A Catalogue of High-Velocity Stars" (in en), The Astrophysical Journal Supplement Series 2: 195, doi:10.1086/190021, ISSN 0067-0049, Bibcode: 1955ApJS....2..195R.
- ↑ "HD 177808". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+177808.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
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