HD 45350 b

HD 45350 b is an extrasolar planet located approximately 160 light-years away in the constellation of Auriga. 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 is from the Sun, but at apastron it is 8 times further. No doubt seasons on the planet would be extreme.

HD 45350 b
Discovery
Discovered byMarcy, Butler,
Vogt, et al.
Discovery siteKeck Observatory, Hawaii
 United States
Discovery dateJanuary 20, 2005
Radial velocity
Orbital characteristics
Apastron3.41 AU (510,000,000 km)
Periastron0.43 AU (64,000,000 km)
1.92 ± 0.067 AU (287,200,000 ± 10,000,000 km)[1]
Eccentricity0.778 ± 0.009[1]
963.6 ± 3.4[1] d
2.64 ± 0.01 y
21.7
2,451,825.3 ± 7.1[1]
343.4 ± 2.3[1]
Semi-amplitude58.0 ± 1.7[1]
StarHD 45350

    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. Peitruss is derived from the name of the Luxembourg river Pétrusse.[2][3]

    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 0.2 AU 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.[4]

    References
    1. Table 2, combined solution, Determination of the Orbit of the Planetary Companion to the Metal-Rich Star HD 45350, Michael Endl, William D. Cochran, Robert A. Wittenmyer, and Artie P. Hatzes, Astronomical Journal 131, #6 (June 2006), pp. 3131–3134, Bibcode: 2006AJ....131.3131E, doi:10.1086/503746.
    2. "Approved names". NameExoworlds. Retrieved 2020-01-02.
    3. "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
    4. 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 134, #3 (September 2007), pp. 1276–1284, Bibcode: 2007AJ....134.1276W, doi:10.1086/520880.

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