| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 01m 30.28830s [1] |
| Declination | +16° 27′ 19.1191″ [1] |
| Apparent magnitude (V) | 5.99 [2] |
| Characteristics | |
| Evolutionary stage | main sequence [3] |
| Spectral type | B9.5 Vn [4] |
| B−V color index | −0.024±0.003 [2] |
| Astrometry | |
| Radial velocity (Rv) | −10.0±1.5 [5] km/s |
| Proper motion (μ) |
RA: +4.12
[6]
mas/
yr Dec.: −5.43 [6] mas/ yr |
| Parallax (π) | 6.2251 ± 0.1419 mas [1] |
| Distance | 520 ± 10
ly (161 ± 4 pc) |
| Absolute magnitude (MV) | −0.09 [2] |
| Details | |
| Mass | 2.93±0.10 [3] M☉ |
| Radius | 3.1 [7] R☉ |
| Luminosity | 121.1+20.2 −17.3 [3] L☉ |
| Surface gravity (log g) | 4.5 [4] cgs |
| Temperature | 9,727+90 −89 [3] K |
| Rotational velocity (v sin i) | 188 [3] km/s |
| Age | 36 [4] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
5 Cancri is a single [9] star in the zodiac constellation of Cancer, located around 520 light years away from the Sun. It is just visible to the naked eye under good seeing conditions as a dim, blue-white hued star with an apparent visual magnitude of 5.99. [2] This object is moving closer to the Sun with a heliocentric radial velocity of −10 km/s. [5]
At one point this was thought to be a spectroscopic binary system. It is a Be star with a weak circumstellar disk of gas that has around three times the radius of the host star. [10] The stellar classification of 5 Cancri is B9.5 Vn, [4] matching a B-type main-sequence star with "nebulous" lines due to rapid rotation. It is 36 [4] million years old with a high projected rotational velocity of 188 km/s. [3] The star has 2.9 [3] times the mass of the Sun and about 3.1 [7] times the Sun's radius. It is radiating 121 [3] times the Sun's luminosity from its photosphere at an effective temperature of 9,727 K. [3]
See also
References
- ^ a b c 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.
- ^ a b c d 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.
- ^ a b c d e f g h i Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars", Astronomy & Astrophysics, 537: A120, arXiv: 1201.2052, Bibcode: 2012A&A...537A.120Z, doi: 10.1051/0004-6361/201117691, S2CID 55586789.
- ^ a b c d e Gullikson, Kevin; et al. (August 2016), "The Close Companion Mass-ratio Distribution of Intermediate-mass Stars", The Astronomical Journal, 152 (2): 13, arXiv: 1604.06456, Bibcode: 2016AJ....152...40G, doi: 10.3847/0004-6256/152/2/40, S2CID 119179065, 40.
- ^ a b Becker, Juliette C.; et al. (April 2015), "Extracting Radial Velocities of A- and B-type Stars from Echelle Spectrograph Calibration Spectra", The Astrophysical Journal Supplement Series, 217 (2): 13, arXiv: 1503.03874, Bibcode: 2015ApJS..217...29B, doi: 10.1088/0067-0049/217/2/29, S2CID 33968873, 29.
- ^ a b van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv: 0708.1752, Bibcode: 2007A&A...474..653V, doi: 10.1051/0004-6361:20078357, S2CID 18759600.
- ^ a b Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (Third ed.): 521–524, arXiv: astro-ph/0012289, Bibcode: 2001A&A...367..521P, doi: 10.1051/0004-6361:20000451, S2CID 425754.
- ^ "5 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-02-23.
- ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv: 0806.2878, Bibcode: 2008MNRAS.389..869E, doi: 10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ Ghosh, K. K.; et al. (January 1999), "Observations of Bn and An stars: New Be stars", Astronomy and Astrophysics Supplement, 134 (2): 359–364, Bibcode: 1999A&AS..134..359G, doi: 10.1051/aas:1999144.
