DX Cancri

DX Cancri

An ultraviolet band light curve for a flare on DX Cancri, adapted from Pettersen (1981)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Cancer
Right ascension 08h 29m 49.345s[2]
Declination +26° 46′ 33.74″[2]
Apparent magnitude (V) 14.81[3]
Characteristics
Spectral type M6.5V[4]
Apparent magnitude (J) 8.2[3]
U−B color index +2.11[5]
B−V color index +2.08[5]
Variable type Flare star[3]
Astrometry
Radial velocity (Rv)+9.0[6] km/s
Proper motion (μ) RA: −1,140[2] mas/yr
Dec.: −602[2] mas/yr
Parallax (π)279.2496 ± 0.0637 mas[7]
Distance11.680 ± 0.003 ly
(3.5810 ± 0.0008 pc)
Absolute magnitude (MV)16.98[8]
Details
Mass0.106±0.009[9] M☉
Radius0.1235±0.0006[9] R☉
Luminosity0.00073±0.000007[9] L☉
Surface gravity (log g)~5[9] cgs
Temperature2,840[10] K
Rotation0.46 days[11]
Rotational velocity (v sin i)11.0[12] km/s
Age200[13] Myr
Other designations
G 051-015, GCTP 2016.01, GJ 1111, LHS 248[3]
Database references
SIMBADdata
DX Cancri is located in the constellation Cancer.
DX Cancri is located in the constellation Cancer.
DX
Location of DX Cancri in the constellation Cancer

DX Cancri is a variable star in the northern zodiac constellation of Cancer. With an apparent visual magnitude of 14.81,[3] it is much too faint to be seen with the naked eye. Visually viewing this star requires a telescope with a minimum aperture of 16 in (41 cm).[14] Based upon parallax measurements, DX Cancri is located at a distance of 11.8 light-years (3.6 parsecs) from Earth. This makes it the 18th closest star (or star system) to the Sun.

The star has a stellar classification of M6.5V,[4] identifying it as a type of main sequence star known as a red dwarf. It has about 10% of the mass of the Sun, and 12% of the Sun's radius.[9] The outer envelope of the star has an effective temperature of 2,840 K,[10] making it an M-type star. It is a flare star that has random, intermittent increases in brightness by up to a factor of five. It is a proposed member of the Castor Moving Group of stars that share a common trajectory through space. This group has an estimated age of 200 million years.[15]

  1. ^ Cite error: The named reference Pettersen was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference susnoccdac was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference simbad was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference apj659_2_1629 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference aj86 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference mnras328_1_45 was invoked but never defined (see the help page).
  7. ^ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  8. ^ Cite error: The named reference recons was invoked but never defined (see the help page).
  9. ^ a b c d e Cite error: The named reference carmenes was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference apj656_2_1121 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference mnras407_4_2269 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference apj704_2_975 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference aaa506_3_1455 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference sherrod_koed2003 was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference aaa460_3_733 was invoked but never defined (see the help page).