R Serpentisis aMira variabletype star in theequatorialconstellationofSerpens.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]
| Observation data EpochJ2000EquinoxJ2000 | |
|---|---|
| Constellation | Serpens |
| Right ascension | 15h50m41.73245s[2] |
| Declination | +15° 08′ 01.0810″[2] |
| Apparent magnitude(V) | 9.70[3] |
| Characteristics | |
| Spectral type | M5-8e[4] |
| B−Vcolor 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 ± 0.2966mas[2] |
| Distance | 930 ± 80ly (280 ± 20pc) |
| Details | |
| Radius | ~380[7]R☉ |
| Luminosity | 1,704.70[8]L☉ |
| Temperature | 2,780±80[9]K |
| Other designations | |
| Database references | |
| SIMBAD | data |
References
edit- ^"Download Data".aavso.org.AAVSO.Retrieved1 October2021.
- ^abcdeBrown, A. G. A.;et al. (Gaia collaboration) (August 2018)."GaiaData 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.
- ^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,S2CID119257644.
- ^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.
- ^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,S2CID125853869.
- ^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,S2CID119231169.
- ^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,S2CID425754.
- ^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,S2CID118665352.
- ^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,S2CID14854720.
- ^"R Ser".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved5 September2018.
- ^Watson, Christopher (4 January 2010)."R Serpentis".AAVSO Website.American Association of Variable Star Observers.Retrieved22 May2014.
- ^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.S2CID117099222.