Astronomy:37 Cancri
From HandWiki
Short description: Star in the constellation Cancer
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 38m 05.17248s[1] |
| Declination | +09° 34′ 28.6006″[1] |
| Apparent magnitude (V) | 6.542[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | A1 V[4][5] |
| B−V color index | −0.010±0.006[6] |
| Astrometry | |
| Radial velocity (Rv) | +22.1±2.2[6] km/s |
| Proper motion (μ) | RA: −28.271[1] mas/yr Dec.: −4.237[1] mas/yr |
| Parallax (π) | 6.5093 ± 0.0735[1] mas |
| Distance | 501 ± 6 ly (154 ± 2 pc) |
| Absolute magnitude (MV) | 1.30[6] |
| Details | |
| Mass | 2.66±0.05[3] M☉ |
| Radius | 1.8[7] R☉ |
| Luminosity | 30.9+3.0 −2.7[2] L☉ |
| Surface gravity (log g) | 4.30[2] cgs |
| Temperature | 9,830[2] K |
| Metallicity [Fe/H] | −0.21±0.13[2] dex |
| Rotational velocity (v sin i) | 35.2±1.1[2] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
37 Cancri is a star in the zodiac constellation of Cancer. It is a challenge to view with the naked eye, having an apparent magnitude of 6.54.[2] The star is moving away from the Earth with a heliocentric radial velocity of +22 km/s, having come as close as 246 light-years some 2.7 million years ago.[6]
This is an ordinary A-type main-sequence star with a stellar classification of A1 V,[4] which indicates it is generating energy through hydrogen fusion at its core. It is spinning with a projected rotational velocity of 35 km/s.[2] The star has 2.7[3] times the mass of the Sun and around 1.8[7] times the Sun's radius. It is radiating 31 times the luminosity of the Sun from its photosphere at an effective temperature of 9,830 K.[2]
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 2.4 2.5 2.6 2.7 2.8 Royer, F. et al. (February 2014), "Normal A0-A1 stars with low rotational velocities. I. Abundance determination and classification", Astronomy & Astrophysics 562: 21, doi:10.1051/0004-6361/201322762, A84, Bibcode: 2014A&A...562A..84R.
- ↑ 3.0 3.1 3.2 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 "37 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=37+Cnc.
- ↑ 6.0 6.1 6.2 6.3 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 7.0 7.1 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.
 |  |
