Kapteyn b
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Exoplanet Kapteyn b |
|
|---|---|
| Constellation | painter |
| Position equinox : J2000.0 |
|
| Right ascension | 05h 11m 40.6s |
| declination | -45 ° 01 ′ 06 ″ |
| Orbit data | |
| Central star | Kapteyn's star |
| Period of circulation | 48.6 d |
| Further data | |
| distance | 3.9 pc |
| history | |
| Date of discovery | 2014 |
Kapteyn b is an exoplanet and orbiting Kapteyn's Star , a 13 light years from our sun distant red dwarf sub in the constellation Pictor the southern sky .
Circulation and mass
Kapteyn's star, one of the stars closest to the Sun, is only around 13 light years away from Earth . So far, two exoplanets orbiting it have been discovered, with Kapteyn b orbiting its central star in about 48 days. Kapteyn b is in the habitable zone , in which there could theoretically be liquid water.
discovery
With the participation of the University of Göttingen , an international team announced the discovery of the two planetary companions Kapteyn b and Kapteyn c on June 4, 2014 . Ansgar Reiners from the Institute for Astrophysics at the University of Göttingen summarized: “ The star's first planet, Kapteyn b, has an orbital period of 48 days and could have liquid water. It is at least five times as heavy as the earth. "Guillem Anglada-Escudé of the University of London's School of Physics and Astronomy , who led the study, added that" previous analyzes showed some variability, "which is why the research team" looked for planets with very short orbital times. “The astronomers reported on their find in the journal Monthly Notices of the Royal Astronomical Society .
The team used data from the HARPS spectrometer of the European Southern Observatory (ESO) and the Las Campanas Observatory in Chile and the Keck Observatory in Hawaii to determine the lower limits for the masses of the planets using the radial velocity method .
At the moment only the periods of revolution and the distance between the planets and their star are known, and based on the data available so far, it remains open whether Kapteyn b is actually life-friendly.
Web links
- Planet Kapteyn b in the Extrasolar Planets Encyclopaedia (English)
- Kapteyn b in the NASA Exoplanet Archive (English)
Individual evidence
- ↑ a b c d e Press release from the University of Göttingen: Kapteyns Stern: A life-friendly world close to the sun? astronews.com, June 4, 2014, accessed June 4, 2014 .
- ↑ Guillem Anglada-Escudé et al .: Two planets around Kapteyn's star: a cold and a temperate super-Earth orbiting the nearest halo red-dwarf . June 4, 2014, arxiv : 1406.0818 .