R Octantis

R Octantis is a Mira variable star located in the southern constellation of Octans. It shines with a luminosity 9304 times that of the Sun and has a surface temperature of 2571 K.[4]

R Octantis
Observation data
Epoch J2000      Equinox J2000
Constellation Octans
Right ascension  05h 26m 06.19562s[1]
Declination −86° 23′ 17.7741″[1]
Apparent magnitude (V) 6.4-13.2[2]
Characteristics
Spectral type M5.5e
Variable type Mira
Astrometry
Radial velocity (Rv)46.00 ± 4.7 km/s
Proper motion (μ) RA: 1.26 ± 0.61[1] mas/yr
Dec.: 28.97 ± 0.94[1] mas/yr
Parallax (π)1.9834 ± 0.1669[3] mas
Distance1,600 ± 100 ly
(500 ± 40 pc)
Details
Luminosity9304[4] L☉
Temperature2571[4] K
Other designations
R Oct, CD−86° 52, HD 40857, HIP 25412.[5]
Database references
SIMBADdata

References
  1. van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. Otero, Sebastian (26 April 2011). "R Octantis". AAVSO Website. American Association of Variable Star Observers. Retrieved 21 April 2016.
  3. 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. Gaia DR2 record for this source at VizieR.
  4. McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (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.
  5. "V* R Oct". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 21 April 2016.


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