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R Serpentis

From Wikipedia, the free encyclopedia
Variable star in the constellation Serpens
R Serpentis

Thevisual bandlight curve of R Serpentis, from AAVSO data[1]
Observation data
Epoch J2000      Equinox J2000
ConstellationSerpens
Right ascension15h 50m 41.73245s[2]
Declination+15° 08′ 01.0810″[2]
Apparent magnitude (V)9.70[3]
Characteristics
Spectral typeM5-8e[4]
B−Vcolor index1.500±0.510[3]
Variable typeMira[5]
Astrometry
Radial velocity (Rv)23.8±0.8[6] km/s
Proper motion (μ)RA: +2.387[2]mas/yr
Dec.: −36.699[2]mas/yr
Parallax (π)3.5110±0.2966 mas[2]
Distance930 ± 80 ly
(280 ± 20 pc)
Details
Radius~380[7] R☉
Luminosity1,704.70[8] L☉
Temperature2,780±80[9] K
Other designations
R Ser,BD+15° 2918,HD 141850,HIP 77615,HR 5894,SAO 101771[10]
Database references
SIMBADdata

R Serpentis is aMira variable type star in theequatorialconstellation ofSerpens. It ranges between apparent magnitude 5.16 and 14.4, and spectral types M5e to M8e, over a period of 356.41 days.[5][11] The variability of this star was discovered in 1826 byKarl Ludwig Harding.[12]

References

[edit]
  1. ^"Download Data".aavso.org. AAVSO. Retrieved1 October 2021.
  2. ^abcdeBrown, A. G. A.; et al. (Gaia collaboration) (August 2018)."Gaia Data Release 2: Summary of the contents and survey properties".Astronomy & Astrophysics.616. A1.arXiv:1804.09365.Bibcode:2018A&A...616A...1G.doi:10.1051/0004-6361/201833051.
  3. ^abAnderson, 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,S2CID 119257644.
  4. ^Keenan, Philip C.; et al. (1974), "Revised Catalog of Spectra of Mira Variables of Types ME and Se",Astrophysical Journal Supplement,28: 271,Bibcode:1974ApJS...28..271K,doi:10.1086/190318.
  5. ^abSamus', N. N; Kazarovets, E. V; Durlevich, O. V; Kireeva, N. N; Pastukhova, E. N (2017), "General catalogue of variable stars: Version GCVS 5.1",Astronomy Reports,61 (1): 80,Bibcode:2017ARep...61...80S,doi:10.1134/S1063772917010085,S2CID 125853869.
  6. ^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,arXiv:1606.08053,Bibcode:2006AstL...32..759G,doi:10.1134/S1063773706110065,S2CID 119231169.
  7. ^Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)",Astronomy and Astrophysics,367 (Third ed.):521–524,arXiv:astro-ph/0012289,Bibcode:2001A&A...367..521P,doi:10.1051/0004-6361:20000451,S2CID 425754.
  8. ^McDonald, I.; et al. (2012), "Fundamental parameters and infrared excesses of Hipparcos stars",Monthly Notices of the Royal Astronomical Society,427 (1):343–357,arXiv:1208.2037,Bibcode:2012MNRAS.427..343M,doi:10.1111/j.1365-2966.2012.21873.x,S2CID 118665352.
  9. ^Hofmann, K. -H.; et al. (January 2002), "Observations of Mira stars with the IOTA/FLUOR interferometer and comparison with Mira star models",New Astronomy,7 (1):9–20,arXiv:astro-ph/0004013,Bibcode:2002NewA....7....9H,doi:10.1016/S1384-1076(01)00085-9,S2CID 14854720.
  10. ^"R Ser".SIMBAD.Centre de données astronomiques de Strasbourg. Retrieved5 September 2018.
  11. ^Watson, Christopher (4 January 2010)."R Serpentis".AAVSO Website.American Association of Variable Star Observers. Retrieved22 May 2014.
  12. ^Zsoldos, E. (1994)."Three Early Variable Star Catalogues".Journal for the History of Astronomy.25 (2):92–98.Bibcode:1994JHA....25...92Z.doi:10.1177/002182869402500202.S2CID 117099222.
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