HD 177808

Last updated
HD 177808
Observation data
Epoch J2000.0        Equinox J2000.0
Constellation Lyra [1]
Right ascension 19h 04m 57.87471s [2]
Declination +31° 44′ 38.6552″ [2]
Apparent magnitude  (V)5.63 [1]
Characteristics
Spectral type M0III [3]
B−V color index 1.548±0.003 [1]
Astrometry
Radial velocity (Rv)3.47±0.14 [1] km/s
Proper motion (μ)RA: +75.049 [2] mas/yr
Dec.: −76.913 [2] mas/yr
Parallax (π)5.8624±0.0556  mas [2]
Distance 556 ± 5  ly
(171 ± 2  pc)
Absolute magnitude  (MV)−0.75 [1]
Details
Mass 4.8 [2]   M☉
Radius 48 [2]   R☉
Luminosity 637 [2]   L☉
Surface gravity (log g)1.17 [2]   cgs
Temperature 4,452 [2]   K
Other designations
BD+31°3453, GC 26266, HD 177808, HIP 93718, HR 7237, SAO 67782 [4]
Database references
SIMBAD data

HD 177808 is a 6th magnitude star in the constellation Lyra, approximately 556 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. 1 2 3 4 5 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters , 38 (5): 331, arXiv: 1108.4971 , Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
  2. 1 2 3 4 5 6 7 8 9 10 Vallenari, A.; et al. (Gaia collaboration) (2023), "Gaia Data Release 3. Summary of the content and survey properties", Astronomy and Astrophysics, 674: A1, arXiv: 2208.00211 , Bibcode:2023A&A...674A...1G, doi: 10.1051/0004-6361/202243940 , S2CID   244398875. Gaia DR3 record for this source at VizieR.
  3. ↑ Roman, Nancy G. (December 1955), "A Catalogue of High-Velocity Stars", The Astrophysical Journal Supplement Series, 2: 195, Bibcode:1955ApJS....2..195R, doi: 10.1086/190021 , ISSN   0067-0049.
  4. ↑ "HD 177808". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2020-02-10.
  5. ↑ 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, arXiv: 0806.2878 , Bibcode:2008MNRAS.389..869E, doi: 10.1111/j.1365-2966.2008.13596.x , S2CID   14878976.


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