Astronomy:29 Cancri
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[1] mas |
| 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
- ↑ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 Abt, Helmut A.; Morrell, Nidia I. (1995), "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars", Astrophysical Journal Supplement 99: 135, doi:10.1086/192182, Bibcode: 1995ApJS...99..135A
- ↑ 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, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D.
- ↑ 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 Zorec, J. et al. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy and Astrophysics 537: A120, doi:10.1051/0004-6361/201117691, Bibcode: 2012A&A...537A.120Z.
- ↑ 6.0 6.1 Pasinetti Fracassini, L. E. et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics 367: 521–524, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P.
- ↑ "29 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=29+Cnc.
- ↑ Radick, R.; Lien, D. (August 1980), "Illinois occultation summary. I. 1977-1978", Astronomical Journal 85: 1053–1061, doi:10.1086/112767, Bibcode: 1980AJ.....85.1053R.
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