R Cancri

Not to be confused with Rho Cancri.
R Cancri

The visual band light curve of R Cancri, from AAVSO data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Cancer
Right ascension 08h 16m 33.82673s[2]
Declination +11° 43′ 34.4691″[2]
Apparent magnitude (V) 6.07 - 12.3[3]
Characteristics
Spectral type M6e-M9e[3]
U−B color index 0.49[4]
B−V color index 1.53[4]
Variable type Mira[3]
Astrometry
Radial velocity (Rv)35.42 ± 0.52[5] km/s
Proper motion (μ) RA: 0.635±0.195[2] mas/yr
Dec.: −10.785±0.106[2] mas/yr
Parallax (π)3.9375 ± 0.1792 mas[2]
Distance854+36
−39 ly
(262+11
−12 pc)[6]
Details
Mass1.67[7] M☉
Radius371±37[8] R☉
Luminosity5,700[8][a] L☉
Surface gravity (log g)−0.608[7] cgs
Temperature2,604±300[8] K
Metallicity [Fe/H]+0.29[7] dex
Other designations
BD+12°1803, HD 69243, HIP 40534, HR 3248, SAO 97694
Database references
SIMBADdata

R Cancri is a Mira variable in the constellation Cancer. Located approximately 250 parsecs (830 ly) distant, it varies between magnitudes 6.07 and 12.3 over a period of approximately 357 days.[3]

  1. ^ Cite error: The named reference aavso was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference edr3 was invoked but never defined (see the help page).
  3. ^ a b c d VSX; Otero, S. A. (7 January 2011). "R Cancri". AAVSO Website. American Association of Variable Star Observers. Retrieved 26 Jan 2021.
  4. ^ a b 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): 165–186. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. S2CID 17804304.
  6. ^ Cite error: The named reference b-j was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference anders was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference karovicova was invoked but never defined (see the help page).


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