R Cancri
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 16m 33.82673s[1] |
| Declination | +11° 43′ 34.4691″[1] |
| Apparent magnitude (V) | 6.07 - 12.3[2] |
| Characteristics | |
| Spectral type | M6e-M9e[2] |
| U−B color index | 0.49[3] |
| B−V color index | 1.53[3] |
| Variable type | Mira[2] |
| Astrometry | |
| Radial velocity (Rv) | 35.42 ± 0.52[4] km/s |
| Proper motion (μ) | RA: 0.635±0.195[1] mas/yr Dec.: −10.875±0.106[1] mas/yr |
| Parallax (π) | 3.9375 ± 0.1792 mas[1] |
| Distance | 830 ± 40 ly (250 ± 10 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
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.[2]
References
- ^ a b c d e 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.
- ^ 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.
- ^ 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.
- ^ 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.
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