29 Cancri
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 28m 37.33859s[1] |
| Declination | +12° 39′ 16.6066″[1] |
| Apparent magnitude (V) | 5.94[2] |
| Characteristics | |
| Spectral type | A5 V[3] |
| B−V color index | 0.201±0.010[2] |
| Astrometry | |
| Radial velocity (Rv) | +2.0±4.3[4] km/s |
| Proper motion (μ) | RA: −13.928[1] mas/yr Dec.: −12.558[1] mas/yr |
| Parallax (π) | 8.8043 ± 0.0747 mas[1] |
| Distance | 370 ± 3 ly (113.6 ± 1.0 pc) |
| Absolute magnitude (MV) | 0.83[2] |
| Details | |
| Mass | 2.30±0.04[5] M☉ |
| Radius | 1.9[6] R☉ |
| Luminosity | 44.8+3.3 −3.1[5] L☉ |
| Temperature | 7,727±71[5] K |
| Rotational velocity (v sin i) | 117[5] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
29 Cancri is a star in the zodiac constellation of Cancer, located 370 light years from the Sun. It is just visible to the naked eye as a dim, white-hued star with an apparent visual magnitude of 5.94.[2] The star is situated near the ecliptic, which means it is subject to lunar occultations.[8]
This is an A-type main-sequence star with a stellar classification of A5 V,[3] which indicates it is generating energy through hydrogen fusion at its core. It has 2.3[5] times the mass of the Sun and around 1.9[6] times the Sun's radius. The star has a relatively high rate of rotation, showing a projected rotational velocity of 117 km/s.[5] It is radiating 45[5] times the Sun's luminosity from its photosphere at an effective temperature of 7,727 K.[5]
References
[edit]- ^ a b c d e 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 Abt, Helmut A.; Morrell, Nidia I. (1995), "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars", Astrophysical Journal Supplement, 99: 135, Bibcode:1995ApJS...99..135A, doi:10.1086/192182
- ^ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
- ^ a b c d e f g h Zorec, J.; et al. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy and Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
- ^ 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.
- ^ "29 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-02-27.
- ^ Radick, R.; Lien, D. (August 1980), "Illinois occultation summary. I. 1977-1978", Astronomical Journal, 85: 1053–1061, Bibcode:1980AJ.....85.1053R, doi:10.1086/112767.
