R Cancri

R Cancri
Observation data
Epoch J2000      Equinox J2000
Constellation Cancer
Right ascension 08h 16m 33.82789s[1]
Declination +11° 43 34.4557[1]
Apparent magnitude (V) 8.64[2]
Characteristics
Spectral type M6.5-9e[3]
U−B color index 0.49[2]
B−V color index 1.53[2]
Variable type Mira[4]
Astrometry
Radial velocity (Rv)35.42 ± 0.52[5] km/s
Proper motion (μ) RA: 4.31 ± 1.57[1] mas/yr
Dec.: -12.58 ± 0.75[1] mas/yr
Parallax (π)1.58 ± 1.43[1] mas
Distanceapprox. 2,000 ly
(approx. 600 pc)
Absolute magnitude (MV)0.36

R Cancri is a Mira variable in the constellation Cancer. Located approximately 633 parsecs (2,060 ly) distant, it varies between magnitudes 6.07 and 11.9 over a period of approximately 357 days.[4]

References

  1. 1.0 1.1 1.2 1.3 1.4 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. 2.0 2.1 2.2 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues 2237: 0. Bibcode:2002yCat.2237....0D.
  3. Keenan, P. C.; Garrison, R. F.; Deutsch, A. J. (1974). "Revised Catalog of Spectra of Mira Variables of Types ME and Se". The Astrophysical Journal Supplement Series 28: 271. doi:10.1086/190318.
  4. 4.0 4.1 VSX; Otero, S. A. (7 January 2011). "R Cancri". AAVSO Website. American Association of Variable Star Observers. Retrieved 15 March 2015.
  5. Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (2005). "Local kinematics of K and M�giants from CORAVEL/Hipparcos/Tycho-2 data". Astronomy and Astrophysics 430: 165. doi:10.1051/0004-6361:20041272.