HD 154345 b
Exoplanet HD 154345 b |
|
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Artist's impression of HD 154345b with a hypothetical moon | |
Constellation | Hercules |
Position equinox : J2000.0 |
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Right ascension | 17h 02m 36.40360s |
declination | + 47 ° 04 ′ 54.7641 ″ |
Orbit data | |
Central star | HD 154345 |
Major semi-axis | 4.19 AU |
eccentricity | 0.044 ± 0.046 |
Period of circulation | 3342 ± 95,000 d |
Further data | |
Minimum dimensions | 0.947 ± 0.090 M J |
distance | 18.06 pc |
history | |
discovery | Wright et al. |
Date of discovery | 2006 |
Catalog names | |
HD 154345 b, HIP 83389 b |
HD 154345 b is an exoplanet orbiting the yellow dwarf HD 154345 in the constellation Hercules , about 59 light years from the Sun.
discovery
The planet was discovered in 2006 by a team of astronomers led by Jason T. Wright using the radial velocity method and the discovery was announced in early 2007. It was based on observations at the Keck Observatory in Hawaii . HD 154345 b was one of the first exoplanets to be classified as analogous to Jupiter .
properties
According to the model calculation of the discovery team, HD 154345 b has a minimum mass of approximately one mass of Jupiter and needs a little more than nine years to orbit its central star. Its major orbit half-axis is approximately 4.2 AU , with the orbit being almost circular. HD 154345 b therefore shows a great similarity to the planet Jupiter in the solar system in terms of mass, orbital time and distance to the star . A more recent study from 2012, however, assumes a higher eccentricity of the planet's orbit.
Web links
- The exoplanet in the "Encyclopedia of Extrasolar Planets"
Individual evidence
- ↑ SIMBAD: HD 154345. Retrieved December 6, 2015 .
- ↑ a b c d e NASA Exoplanet Archive: HD 154345 b. Retrieved December 6, 2015 .
- ^ Wright, JT, Marcy, GW, Fischer, DA, et al .: Four New Exoplanets and Hints of Additional Substellar Companions to Exoplanet Host Stars . 2007, doi : 10.1086 / 510553 , arxiv : astro-ph / 0611658 .
- ↑ a b Wright, JT et al .: The Jupiter Twin HD 154345b . July 23, 2008, doi : 10.1086 / 587461 , arxiv : 0802.1731 .
- ^ I. Boisse et al .: The SOPHIE search for northern extrasolar planets. V. Follow-up of ELODIE candidates: Jupiter-analogs around Sun-like stars . September 2012, doi : 10.1051 / 0004-6361 / 201118419 , arxiv : 1205.5835 .