53 Cancri
53 Cancri is a variable star in the zodiac constellation Cancer, located around 960 light years from the Sun. It has the variable star designation BO Cancri; 53 Cancri is the Flamsteed designation. This object is a challenge to view with the naked eye, having an apparent visual magnitude around 6. It is around 960 light years away.
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Cancer |
Right ascension | 08h 52m 28.58850s[1] |
Declination | +28° 15′ 32.9851″[1] |
Apparent magnitude (V) | 5.9 - 6.4[2] |
Characteristics | |
Evolutionary stage | red giant |
Spectral type | M3 III[3] |
B−V color index | 1.552±0.010[3] |
Variable type | SRb[2] |
Astrometry | |
Radial velocity (Rv) | +13.82±0.29[3] km/s |
Proper motion (μ) | RA: −15.212[1] mas/yr Dec.: −7.961[1] mas/yr |
Parallax (π) | 3.4133 ± 0.1685[1] mas |
Distance | 960 ± 50 ly (290 ± 10 pc) |
Details | |
Radius | 87[1] R☉ |
Luminosity | 1,175[1] L☉ |
Temperature | 3,622[1] K |
Other designations | |
Database references | |
SIMBAD | data |
The star is moving further away from the Earth with a heliocentric radial velocity of +14 km/s.[3] 53 Cancri is an aging red giant on the asymptotic giant branch[5] and has a stellar classification of M3 III.[3] It has expanded to 87 times the radius of the Sun, and its bolometric luminosity is over a thousand times higher than the Sun's at an effective temperature of 3,622 K.[1]
53 Cancri is a semiregular variable that varies between magnitude 5.9 and 6.4 with a period of 27 days.[2] There is a suspected second period of 270 days.[6]
References
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- Samus, N. N.; Durlevich, O. V.; et al. (2009), "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)", VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S, 1: B/gcvs, Bibcode:2009yCat....102025S.
- Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- "53 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-03-06.
- Lebzelter, T.; Hron, J. (2003), "Technetium and the third dredge up in AGB stars", Astronomy & Astrophysics, 411 (3): 533–542, arXiv:astro-ph/0610500, Bibcode:2003A&A...411..533L, doi:10.1051/0004-6361:20031458, S2CID 18879265.
- Glass, I. S.; Van Leeuwen, F. (2007), "Semiregular variables in the solar neighbourhood", Monthly Notices of the Royal Astronomical Society, 378 (4): 1543–1549, arXiv:0704.3150, Bibcode:2007MNRAS.378.1543G, doi:10.1111/j.1365-2966.2007.11903.x, S2CID 14332208.