30 Arietis Bb
|
Exoplanet 30 Arietis Bb |
|
|---|---|
| Constellation | Aries |
| Position equinox : J2000.0 |
|
| Right ascension | 02h 36m 57.7405s |
| declination | + 24 ° 38 ′ 53.027 ″ |
| Orbit data | |
| Central star | 30 Arietis B |
| Major semi-axis | 0.995 ± 0.012 AU |
| eccentricity | 0.289 ± 0.092 |
| Period of circulation | 335.1 ± 2.5 d |
| Further data | |
| Minimum dimensions | 9.88 ± 0.94 M ♃ |
| distance | 133 ± 3 pc |
| history | |
| discovery | Guenther et al. |
| Date of discovery | November 27, 2009 |
| Catalog names | |
| 30 Ari Bb | |
30 Arietis Bb (also abbreviated 30 Ari Bb ) is an extrasolar planet that orbits the main sequence star 30 Arietis B in the quadruple star system 30 Arietis at a distance of 129 light years from the sun in the constellation Aries .
properties
The planet has a minimum mass of around ten Jupiter's masses . Its actual mass is unknown as its orbit inclination is also unknown . The orbit of 30 Arietis Bb around its central star is only 0.005 AU (or 700,000 km) closer to it than the Earth's orbit around the sun, but it is much more eccentric than Earth's orbit. In the periastron , the planet approaches its central star to within 0.708 AU, slightly closer than the distance between the Sun and Venus . In the Apastron , however, 30 Arietis Bb is up to 1.283 AU from the star, which is more than half the distance between the orbits of Earth and Mars .
discovery
The gas giant was discovered on November 27, 2009 using the radial velocity method through the Alfred Jensch telescope of the Thuringian State Observatory in Tautenburg .
Individual evidence
- ^ A b van Leeuwen, F .: Validation of the new Hipparcos reduction . arxiv : 0708.1752 .
- ↑ a b Guenther, EW et al .: A substellar component orbiting the star 30 F-Ari B . arxiv : 0912.4619 .
Web links
- The Extrasolar Planets Encyclopaedia: Planet 30 Ari B b. Retrieved April 27, 2015 . (English)
- Stars and Space from March 5, 2015: An extrasolar planet with four suns. Retrieved April 27, 2015 . (German)