Astronomy:34 Cancri
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 32m 39.87069s[1] |
| Declination | +10° 03′ 57.6306″[1] |
| Apparent magnitude (V) | 6.48[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | A1 V[4][5] |
| B−V color index | −0.007±0.007[2] |
| Astrometry | |
| Radial velocity (Rv) | −11.0±7.4[6] km/s |
| Proper motion (μ) | RA: +4.517[1] mas/yr Dec.: −6.139[1] mas/yr |
| Parallax (π) | 5.7408 ± 0.0912[1] mas |
| Distance | 568 ± 9 ly (174 ± 3 pc) |
| Absolute magnitude (MV) | 0.40[2] |
| Details | |
| Mass | 2.67±0.09[3] M☉ |
| Radius | 3.2[7] R☉ |
| Luminosity | 69.84[2] L☉ |
| Surface gravity (log g) | 3.83[7] cgs |
| Temperature | 9,661±111[3] K |
| Rotational velocity (v sin i) | 18[3] km/s |
| Age | 336[2] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
34 Cancri is a star in the zodiac constellation of Cancer, located about 568 light years away from the Sun.[1] It is a challenge to view with the naked even under good viewing conditions, having an apparent visual magnitude of 6.48.[2] At the distance of this star, its visual magnitude is diminished by an extinction of 0.14 due to interstellar dust.[8]
This is an A-type main-sequence star with a stellar classification of A1 V.[4] It is a chemically peculiar star, possibly of the magnetic-type (CP2), showing an abnormal abundance of strontium.[9] The star is an estimated 336[2] million years old with only a moderate projected rotational velocity of 18 km/s.[3] It has an estimated 2.7 times the mass of the Sun[3] and about 3.2 times the Sun's radius.[7] The star is radiating 70 times the Sun's luminosity[2] from its photosphere at an effective temperature of 9,661 K.[3]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 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 2.4 2.5 2.6 2.7 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 Cowley, A. et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375–406, doi:10.1086/110819, Bibcode: 1969AJ.....74..375C.
- ↑ 5.0 5.1 "34 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=34+Cnc.
- ↑ 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.
- ↑ 7.0 7.1 7.2 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. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters 38 (11): 694–706, doi:10.1134/S1063773712110035, Bibcode: 2012AstL...38..694G.
- ↑ Wraight, K. T. et al. (February 2012), "A photometric study of chemically peculiar stars with the STEREO satellites - I. Magnetic chemically peculiar stars", Monthly Notices of the Royal Astronomical Society 420 (1): 757–772, doi:10.1111/j.1365-2966.2011.20090.x, Bibcode: 2012MNRAS.420..757W.
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