R Cancri

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[1] mas
Distance	830 ± 40 ly ; (250 ± 10 pc)
Other designations
	BD+12°1803, HD 69243, HIP 40534, HR 3284, SAO 97694
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

Brown, A. G. A.; et al. (Gaia collaboration). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics (in press). arXiv:2012.01533. doi:10.1051/0004-6361/202039657. S2CID 227254300. Gaia EDR3 record for this source at VizieR.
VSX; Otero, S. A. (7 January 2011). "R Cancri". AAVSO Website. American Association of Variable Star Observers. Retrieved 26 Jan 2021.
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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[edr3-1] Brown, A. G. A.; et al. (Gaia collaboration). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics (in press). arXiv:2012.01533. doi:10.1051/0004-6361/202039657. S2CID 227254300. Gaia EDR3 record for this source at VizieR.

[AAVSO-2] VSX; Otero, S. A. (7 January 2011). "R Cancri". AAVSO Website. American Association of Variable Star Observers. Retrieved 26 Jan 2021.

[Ducati-3] 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-4] 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.