The Kapteyn's Star reference article from the English Wikipedia on 24-Jul-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Kapteyn's Star

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. Later it dropped to second place after the discovery of Barnard's Star.

Table of contents

1 Some facts about Kapteyn's Star 2 See also 3 External links

Some facts about Kapteyn's Star

• Parallax: 0.255 arcsecs
• Spectral type: M0 V
• Radial velocity: +246.3 km/s
• Proper Motion: 8.671 arcsecs/year
• Apparent Visual Magnitude: 8.86
• Absolute Visual Magnitude: 10.9
• Luminosity: 0.013 Solar Luminosities

See also

• List of nearest stars
• Space

External links

• SolStation.com: Kapteyn's Star

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