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) 6.07 - 11.9[2]
Characteristics
Spectral type M6.5-9e[3]
U−B color index 0.49[4]
B−V color index 1.53[4]
Variable type Mira[2]
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
Other designations
HD 69243, HIP 40534, HR 3284, SAO 97694, BD+12° 1803
Database references
SIMBADdata

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.[2]

References

  1. 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752 Freely accessible. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. 1 2 3 VSX; Otero, S. A. (7 January 2011). "R Cancri". AAVSO Website. American Association of Variable Star Observers. Retrieved 15 March 2015.
  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. Bibcode:1974ApJS...28..271K. doi:10.1086/190318.
  4. 1 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.
  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. Bibcode:2005A&A...430..165F. arXiv:astro-ph/0409579 Freely accessible. doi:10.1051/0004-6361:20041272.
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