DX Cancri

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Template:Short description Template:Sky

DX Cancri
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Observation data
Epoch J2000      Equinox J2000
Constellation Cancer
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 14.81[2]
Characteristics
Spectral type M6.5V[3]
Apparent magnitude (J) 8.2[2]
U−B Template:Engvar +2.11[4]
B−V Template:Engvar +2.08[4]
Variable type Flare star[2]
Astrometry
Radial velocity (Rv)+9.0[5] km/s
Proper motion (μ) RA: Script error: No such module "val". mas/yr[1]
Dec.: −612.191 mas/yr[1]
Parallax (π)279.2496±0.0637 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)16.98[6]
Details
MassScript error: No such module "val".[7] Template:Solar mass
RadiusScript error: No such module "val".[7] Template:Solar radius
LuminosityScript error: No such module "val".[7] Template:Solar luminosity
Surface gravity (log g)~5[7] cgs
Temperature2,840[8] K
Rotation0.46 days[9]
Rotational velocity (v sin i)11.0[10] km/s
Age200[11] Myr
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
G 051-015, GCTP 2016.01, GJ 1111, LHS 248[2]
Database references
SIMBADdata
File:DXCncLightCurve.png
An ultraviolet band light curve for a flare on DX Cancri, adapted from Pettersen (1981)[12]

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DX Cancri is a red dwarf star in the northern zodiac constellation of Cancer. It is the 18th closest star (or star system) to the Sun, at a distance of Script error: No such module "convert". as determined by its parallax. It is also the nearest star in Cancer.[13] Despite this, the star has less than 1% of the Sun's luminosity[7] and, with an apparent visual magnitude of 14.81,[2] is far too faint to be seen with the naked eye. Visually viewing this star requires a telescope with a minimum aperture of Script error: No such module "convert"..[14]

In 1981, Bjørn Ragnvald Pettersen discovered that the star, then called G 51-15, is a variable star.[15] It was given its variable star designation, DX Cancri, in 1985.[16] It is a flare star that has unpredictable, intermittent increases in brightness by up to a factor of five.

The star has a stellar classification of M6.5V,[3] identifying it as a type of main sequence star known as a red dwarf. Such stars are characterized by their high abundance in the universe, low mass, radius, faint brightness and reddish color.[17] It has about 10% of the mass of the Sun, and 12% of the Sun's radius.[7] The outer envelope of the star has an effective temperature of 2,840 K.[8]

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.[18]

References

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  1. ↑ a b c d Template:Cite Gaia DR3
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  7. ↑ a b c d e f Script error: No such module "Citation/CS1".
  8. ↑ a b Script error: No such module "Citation/CS1".
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  10. ↑ Script error: No such module "Citation/CS1".
  11. ↑ Script error: No such module "Citation/CS1".
  12. ↑ Script error: No such module "Citation/CS1".
  13. ↑ Script error: No such module "Citation/CS1".
  14. ↑ Script error: No such module "citation/CS1".
  15. ↑ Script error: No such module "Citation/CS1".
  16. ↑ Script error: No such module "Citation/CS1".
  17. ↑ Script error: No such module "citation/CS1".
  18. ↑ Script error: No such module "Citation/CS1".

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Further reading

External links

Template:Nearest systems Template:Stars of Cancer

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