| Discovery | |
|---|---|
| Discovered by | Marcy,Butler, Vogt, et al. |
| Discovery site | Keck Observatory,Hawaii United States |
| Discovery date | January 20, 2005 |
| Radial velocity | |
| Orbital characteristics | |
| Apastron | 3.41 AU (510,000,000 km) |
| Periastron | 0.43 AU (64,000,000 km) |
| 1.92 ± 0.067 AU (287,200,000 ± 10,000,000 km)[1] | |
| Eccentricity | 0.778 ± 0.009[1] |
| 963.6 ± 3.4[1]d 2.64 ± 0.01y | |
Averageorbital speed | 21.7 |
| 2,451,825.3 ± 7.1[1] | |
| 343.4 ± 2.3[1] | |
| Semi-amplitude | 58.0 ± 1.7[1] |
| Star | HD 45350 |
HD 45350 b is anextrasolar planet located approximately 160light-years away in theconstellation ofAuriga. It has aminimum mass about 1.79 times that ofJupiter. The mean distance of the planet from the star is more than the distance betweenMars and theSun, but due to the planet's high orbitaleccentricity, it is as close to the star asMercury is from the Sun atperiastron, while atapastron, it is eight times further.
The planet HD 45350 b is namedPeitruss. The name was selected in theNameExoWorlds campaign byLuxembourg, during the 100th anniversary of theIAU. Peitruss is derived from the name of the Luxembourg riverPétrusse.[2][3] The 2019–2020 class of 3B from the Luxembourgish Echternach high school won the contest to name both the star and its planet. The students who helped name both celestial objects were Lucien Nicolas Berger, Léna Boucq Kieffel, Ben de Boer, Cédric Dehlez, Nicolas Delhez, Sergio Manuel Dias Costa, Pierre Fusshoeller, Jil Menei, Philippe Schaack and Claire Zeien. The overseeing committee members who organized the contest and the vote of the respective celestial objects were Eric Buttini, Patrick Michaely, Nicolas Faber, Jeanny-Jungbluth-Schmidt and Yanna Di Ronco.[4]
Dynamical simulations covering a period of 107 years show that a second, low-mass, planet could only orbit stably if it were no more than 0.2AU away from the star; in the simulations, these planets show oscillations in eccentricity up to an eccentricity of 0.25.Radial velocity observations rule out any such planet whose mass is greater than 4 Neptune masses.[5]
