Categories
  • M-type giants
  • Bright Star Catalogue objects
  • Hipparcos objects
  • Durchmusterung objects
    •   Encyclosphere.org ENCYCLOREADER
      supported by EncyclosphereKSF

    HD 177808

    Topic: Astronomy

     From Handwiki - Reading time: 2 min
    Short description: Star in the constellation Lyra
    HD 177808
    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
    Distance551 ± 8 ly
    (169 ± 2 pc)
    Absolute magnitude (MV)−0.75[2]
    Details
    Radius42.27+1.26
    −4.39    [1] R☉
    Luminosity387.9±6.8[1] L☉
    Temperature3,940+233
    −58    [1] K
    Other designations
    BD+31°3453, GC 26266, HD 177808, HIP 93718, HR 7237, SAO 67782[4]
    Database references
    SIMBADdata

    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. ↑ 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. ↑ 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. 
    3. ↑ 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. 
    4. ↑ "HD 177808". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+177808. 
    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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E. 




    Retrieved from "https://handwiki.org/wiki/index.php?title=Astronomy:HD_177808&oldid=3425338"
    This article is licensed under CC BY-SA 3.0.
    Original source: https://handwiki.org/wiki/HD 177808
    Status: article is cached
    Encyclosphere.org EncycloReader is supported by the EncyclosphereKSF