DX Cancri

DX Cancri
Observation data
Epoch J2000      Equinox J2000
Constellation Cancer
Right ascension 08h 29m 49.345s[1]
Declination +26° 46′ 33.74″[1]
Apparent magnitude (V) 14.81[2]
Characteristics
Spectral type M6.5V[3]
U−B color index +2.11[4]
B−V color index +2.08[4]
Variable type Flare star[2]
Astrometry
Radial velocity (Rv) +9.0[5] km/s
Proper motion (μ) RA: –1140[1] mas/yr
Dec.: –602[1] mas/yr
Parallax (π) 275.80 ± 3.00[6] mas
Distance 11.8 ± 0.1 ly
(3.63 ± 0.04 pc)
Absolute magnitude (MV) 16.98[7]
Details
Mass 0.09[7] M
Radius 0.4[citation needed] R
Luminosity 0.04[citation needed] L
Temperature 2,840[8] K
Rotational velocity (v sin i) 11.0[9] km/s
Other designations
Gl 051-015, GCTP 2016.01, LHS 248, GJ 1111.[2]

DX Cancri is a red dwarf star that is about 9% of the mass of our Sun.[7] It is a flare star that has intermittent changes in brightness by up to a fivefold increase.

DX Cancri is far too faint to be seen with the naked eye, even though it is the 18th closest star system to the Sun at a distance of 11.8 light years. It is the closest star in the constellation Cancer.

See also

References

  1. ^ a b c d Zacharias, N.; et al. (2003). The Second U.S. Naval Observatory CCD Astrograph Catalog (UCAC2). CDS/ADC Collection of Electronic Catalogues, 1289, 0 (2003). http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?2003yCat.1289....0Z&db_key=AST&nosetcookie=1. Retrieved 2010-06-29. 
  2. ^ a b c "V* DX Cnc -- Flare Star". SIMBAD. Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=DX+Cancri. Retrieved 2010-06-29. 
  3. ^ Luhman, K. L.; et al. (April 2007). "Ophiuchus 1622-2405: Not a Planetary-Mass Binary". The Astrophysical Journal 659 (2): 1629–1636. arXiv:astro-ph/0701242. Bibcode 2007ApJ...659.1629L. doi:10.1086/512539. 
  4. ^ a b Weistrop, D. (August 1981). "The nature of the Giclas +4 stars". Astronomical Journal 86: 1220–1227. Bibcode 1981AJ.....86.1220W. doi:10.1086/113001. 
  5. ^ Montes, D.; et al. (November 2001). "Late-type members of young stellar kinematic groups - I. Single stars". Monthly Notices of the Royal Astronomical Society 328 (1): 45–63. arXiv:astro-ph/0106537. Bibcode 2001MNRAS.328...45M. doi:10.1046/j.1365-8711.2001.04781.x. 
  6. ^ van Altena, W. F.; Lee, J. T.; Hoffleit, E. D. (1995). The general catalogue of trigonometric [stellar] parallaxes (4th ed.). New Haven, CT: Yale University Observatory. http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?1995GCTP..C......0V. Retrieved 2010-06-29. 
  7. ^ a b c "The One Hundred Nearest Star Systems". RECONS. Georgia State University. January 1, 2009. http://www.chara.gsu.edu/~thenry/RECONS/TOP100.posted.htm. Retrieved 2010-06-29. 
  8. ^ Reiners, A.; Basri, G. (February 2007). "The First Direct Measurements of Surface Magnetic Fields on Very Low Mass Stars". The Astrophysical Journal 656 (2): 1121–1135. arXiv:astro-ph/0610365. Bibcode 2007ApJ...656.1121R. doi:10.1086/510304. 
  9. ^ Jenkins, J. S.; et al. (October 2009). "Rotational Velocities for M Dwarfs". The Astrophysical Journal 704 (2): 975–988. Bibcode 2009ApJ...704..975J. doi:10.1088/0004-637X/704/2/975. 

External links


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