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R Aurigae (R Aur) is a Mira variable, a pulsating red giant star in the constellation of Auriga, at a distance of 930 light years.

R Aurigae

The visual band light curve of R Aurigae, from AAVSO data[1]
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Auriga
Right ascension 05h 17m 17.6916s[2]
Declination +53° 35′ 10.032″[2]
Apparent magnitude (V) 6.7 to 13.9[3]
Characteristics
Spectral type M7IIIe[4] (M6e - M9e)[3]
U−B color index +0.27[5]
B−V color index +1.66[5]
Variable type Mira[3]
Astrometry
Radial velocity (Rv)7.8 ± 2[6] km/s
Proper motion (μ) RA: 14.708[2] mas/yr
Dec.: −14.685[2] mas/yr
Parallax (π)3.4958 ± 0.1327 mas[2]
Distance930 ± 40 ly
(290 ± 10 pc)
Details
Radius300[7] R☉
Luminosity11,530[8] L☉
Temperature2,385[8] K
Other designations
R Aur, ADS 3845 A, BD+53 882, CCDM J05173+5335A, GC 6435, HD 34019, HIP 24645, HR 1707, IDS 05092+5328 A, SAO 25112[6]
Database references
SIMBADdata

R Aurigae has an apparent visual magnitude which varies between 6.7 and 13.9 with a period of 450 days.[3] The light curve varies strongly from cycle to cycle, sometimes having a pronounced hump on the ascending branch and usually having rise and fall times approximately equal. The cycle period has oscillated slowly between about 450 and 465 days. The discoverer of R Aurigae's variability is not known, but it was widely observed in the late 19th century and its spectrum was described in 1890.[9]

R Aurigae is catalogued as a component of a double star, with the 10th magnitude HD 233095, although the two stars are unrelated.[10]


References


  1. "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
  2. Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  3. R Aur, database entry, The combined table of GCVS Vols I-III and NL 67-78 with improved coordinates, General Catalogue of Variable Stars, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line November 10, 2009.
  4. Skiff, B. A. (1994). "Photometry of Stars in the Field of R Aurigae". Information Bulletin on Variable Stars. 4058: 1. Bibcode:1994IBVS.4058....1S.
  5. HR 1707, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line November 10, 2009.
  6. "V* R Aur". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved February 24, 2021.
  7. HD 34019, database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID II/224. Accessed on line November 10, 2009.
  8. McDonald, I.; et al. (2012). "Fundamental Parameters and Infrared Excesses of Hipparcos Stars". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–57. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. S2CID 118665352.
  9. "LPV of the Month December, 2016". Retrieved 2021-02-24.
  10. Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920.

На других языках

- [en] R Aurigae

[ru] R Возничего

R Возничего (лат. R Aurigae), HD 34019 — двойная звезда в созвездии Возничего на расстоянии приблизительно 739 световых лет (около 227 парсеков) от Солнца. Видимая звёздная величина звезды — от +14m до +6,7m[7].


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