Kapteyn's Star

Kapteyn's Star

Starbox begin
name=Kapteyn's Star Starbox observe
epoch=J2000
constell=Pictor
ra=05h 11m 40.6s
dec=-45° 01' 06"
appmag_v=8.85 Starbox character
class=sdM1 V
b-v=1.56
u-b=1.15
variable="Unknown" Starbox astrometry
radial_v=+245.5
prop_mo_ra=6506.05
prop_mo_dec=-5731.39
parallax=255.27
p_error=0.86
absmag_v=10.88 Starbox detail
mass=0.38
radius=0.24
luminosity=0.004 | temperature=3,800
metal=32%
rotation=
age=? Starbox catalog
names=VZ Pictoris, GJ 191, HD 33793, CD-45°1841, CP(D)-44°612, SAO 217223, LHS 29, LTT 2200, LFT 395, CD GCTP 1181, UGPMF 628, HIP 24186.

Kapteyn's Star (also known as GJ 191, HD 33793 or CD -45 1841) is a class M0 subdwarf discovered by Jacobus Kapteyn in 1897. It is 12.79 light years from Earth's Solar System, and is distinctive in a number of regards; it has a high radial velocity, orbits the Milky Way retrograde, and is the nearest halo star to the Sun.

When discovered, it had the highest proper motion of any star known, dethroning Groombridge 1830. Later it dropped to second place after the discovery of Barnard's Star.

ee also

* Kapteyn's Star in fiction
* List of nearest stars

External links

* [http://www.solstation.com/stars/kapteyns.htm SolStation.com: Kapteyn's Star]

Discovery announced

* [http://fulltext.ads.harvard.edu//full/seri/AN.../0145//0000085.000.html "Stern mit grösster bislang bekannter Eigenbewegung", AN 145 (1898) 159/160] (in German)


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