Astronomy:29 Cancri
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Short description: Star in the constellation Cancer
| 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 | |
| Evolutionary stage | main sequence[3] |
| Spectral type | A5 V[4] |
| B−V color index | 0.201±0.010[2] |
| Astrometry | |
| Radial velocity (Rv) | +2.0±4.3[5] 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[3] M☉ |
| Radius | 3.6[6] R☉ |
| Luminosity | 44.8+3.3 −3.1[3] L☉ |
| Surface gravity (log g) | 3.56[6] cgs |
| Temperature | 7,727±71[3] K |
| Rotational velocity (v sin i) | 117[3] km/s |
| Age | 784[7] Gyr |
| 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.[9]
This is an A-type main-sequence star with a stellar classification of A5 V,[4] which indicates it is generating energy through hydrogen fusion at its core. It has 2.3 times the mass of the Sun[3] and around 3.6 times the Sun's radius.[6] The star has a relatively high rate of rotation, showing a projected rotational velocity of 117 km/s. It is radiating 45 times the Sun's luminosity from its photosphere at an effective temperature of 7,727 K.[3]
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 3.2 3.3 3.4 3.5 3.6 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.
- ↑ 4.0 4.1 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.
- ↑ 6.0 6.1 6.2 Stassun, Keivan G. et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S.
- ↑ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters 38 (12): 771. doi:10.1134/S1063773712120031. Bibcode: 2012AstL...38..771G.
- ↑ "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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