DX Cancri
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| 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 | |
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.
[edit] See also
[edit] References
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
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