HD 45350 b is an
extrasolar planet located approximately 160
light-year
A light-year, alternatively spelled light year, is a large unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (), or 5.88 trillion miles ().One trillion here is taken to be 1012 ...
s away in the
constellation
A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.
The origins of the e ...
of
Auriga
AURIGA (''Antenna Ultracriogenica Risonante per l'Indagine Gravitazionale Astronomica'') is an ultracryogenic resonant bar gravitational wave detector in Italy. It is at the Laboratori Nazionali di Legnaro of the Istituto Nazionale di Fisica Nuclea ...
. It has a
minimum mass about 1.79 times that of
Jupiter. The mean distance of the planet from the star is more than the distance between
Mars and the
Sun, but the
eccentricity of the orbit is nothing short of remarkable; at
periastron the planet is as close to the star as
Mercury
Mercury commonly refers to:
* Mercury (planet), the nearest planet to the Sun
* Mercury (element), a metallic chemical element with the symbol Hg
* Mercury (mythology), a Roman god
Mercury or The Mercury may also refer to:
Companies
* Merc ...
is from the Sun, but at
apastron it is 8 times further. No doubt
seasons on the planet would be extreme.
The planet HD 45350 b is named Peitruss. The name was selected in the
NameExoWorlds campaign by
Luxembourg, during the 100th anniversary of the
IAU
The International Astronomical Union (IAU; french: link=yes, Union astronomique internationale, UAI) is a nongovernmental organisation with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach ...
. Peitruss is derived from the name of the Luxembourg river
Pétrusse
The Pétrusse (; lb, Péitruss, german: Petruss) is a river flowing through Luxembourg, joining the Alzette at Luxembourg City. It flows through the town of Hollerich
Hollerich ( lb, Hollerech) is a quarter in south-western Luxembourg City, i ...
. The year 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.
Dynamical simulations covering a period of 10
7 years show that a second, low-mass, planet could only orbit stably if it were no more than 0.2
AU away from the star; in the simulations, these planets show oscillations in eccentricity up to an eccentricity of 0.25.
Radial velocity
The radial velocity or line-of-sight velocity, also known as radial speed or range rate, of a target with respect to an observer is the temporal rate of change, rate of change of the distance or Slant range, range between the two points. It is e ...
observations rule out any such planet whose mass is greater than 4 Neptune masses.
[Dynamical and Observational Constraints on Additional Planets in Highly Eccentric Planetary Systems, Robert A. Wittenmyer, Michael Endl, William D. Cochran, and Harold F. Levison, '']Astronomical Journal
''The Astronomical Journal'' (often abbreviated ''AJ'' in scientific papers and references) is a peer-reviewed monthly scientific journal owned by the American Astronomical Society (AAS) and currently published by IOP Publishing. It is one of the p ...
'' 134, #3 (September 2007), pp. 1276–1284, , .
References
External links
*
HD 45350b Simulation*
{{DEFAULTSORT:Hd 45350 B
Auriga (constellation)
Exoplanets discovered in 2004
Giant planets
Exoplanets detected by radial velocity
Exoplanets with proper names
de:HD 45350 b