12 Cancri

Last updated
12 Cancri
Observation data
Epoch J2000       Equinox J2000
Constellation Cancer
Right ascension 08h 08m 42.4457s [1]
Declination +13° 38′ 27.307″ [1]
Apparent magnitude  (V)6.25 [2]
Characteristics
Spectral type F3 V [3]
B−V color index 0.480±0.007 [2]
Astrometry
Radial velocity (Rv)−10.0±4.3 [4] km/s
Proper motion (μ)RA: +2.776 [1] mas/yr
Dec.: −14,723 [1] mas/yr
Parallax (π)12.7085±0.1327  mas [1]
Distance 257 ± 3  ly
(78.7 ± 0.8  pc)
Absolute magnitude  (MV)1.59 [5]
Details
Mass 1.16 [6]   M☉
Luminosity 17.94 [2]   L☉
Surface gravity (log g)3.60±0.14 [6]   cgs
Temperature 6,357±88 [7]   K
Metallicity [Fe/H]0.04 [7]   dex
Rotational velocity (v sin i)52.3±4.1 [5]  km/s
Age 2.466 [6]   Gyr
Other designations
12 Cnc, BD+14°1831, HD 67483, HIP 39874, HR 3184, SAO 97594 [8]
Database references
SIMBAD data

12 Cancri is a star in the zodiac constellation Cancer. It has an apparent visual magnitude of 6.25, [2] placing just below the normal limit for stars visible to the naked eye in good seeing conditions. The star displays an annual parallax shift of 12.7  mas as seen from Earth's orbit, which places it at a distance of about 257  light-years. It is moving toward the Sun with a radial velocity of around −10 km/s. [4]

This is an ordinary F-type main-sequence star with a stellar classification of F3 V, [3] which indicates it is generating energy through hydrogen fusion at its core. It is spinning with a projected rotational velocity of 52 [5]  km/s and appears to be undergoing solar-like differential rotation with relative rate of α = 0.33±0.13. [9] The star is about 2.5 [6]   billion years old with 1.16 [6] times the mass of the Sun and is radiating nearly 18 [2] times the Sun's luminosity from its photosphere at an effective temperature of around 6,357  K . [7]

References

  1. 1 2 3 4 5 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR .
  2. 1 2 3 4 5 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.
  3. 1 2 Balachandran, Suchitra (May 1, 1990), "Lithium depletion and rotation in main-sequence stars", Astrophysical Journal, Part 1, 354: 310–332, Bibcode:1990ApJ...354..310B, doi:10.1086/168691.
  4. 1 2 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.
  5. 1 2 3 Ammler-von Eiff, Matthias; Reiners, Ansgar (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics, 542: A116, arXiv: 1204.2459 , Bibcode:2012A&A...542A.116A, doi:10.1051/0004-6361/201118724, S2CID   53666672.
  6. 1 2 3 4 5 David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv: 1501.03154 , Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID   33401607.
  7. 1 2 3 Casagrande, L.; et al. (June 2011), "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey", Astronomy and Astrophysics, 530: A138, arXiv: 1103.4651 , Bibcode:2011A&A...530A.138C, doi:10.1051/0004-6361/201016276, S2CID   56118016.
  8. ↑ "12 Cnc". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2018-02-09.
  9. ↑ Reiners, Ansgar; Schmitt, Jürgen H. M. M. (December 2003), "Differential rotation in rapidly rotating F-stars", Astronomy and Astrophysics, 412 (3): 813−819, arXiv: astro-ph/0309616 , Bibcode:2003A&A...412..813R, doi:10.1051/0004-6361:20034255, S2CID   16900202.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.