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R Serpentis

The visual band light curve of R Serpentis, from AAVSO data [1]
Observation data
Epoch J2000       Equinox J2000
Constellation Serpens
Right ascension 15h 50m 41.73245s [2]
Declination +15° 08′ 01.0810″ [2]
Apparent magnitude (V) 9.70 [3]
Characteristics
Spectral type M5-8e [4]
B−V color index 1.500±0.510 [3]
Variable type Mira [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
SIMBAD data

R Serpentis is a Mira variable type star in the equatorial constellation of Serpens. 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 by Karl Ludwig Harding. [12]

References

  1. ^ "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
  2. ^ a b c d e Brown, 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. ^ a b 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, 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. ^ a b Samus', 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. Retrieved 5 September 2018.
  11. ^ Watson, Christopher (4 January 2010). "R Serpentis". AAVSO Website. American Association of Variable Star Observers. Retrieved 22 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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