HD 46375 b

HD 46375 b is an extrasolar planet located approximately 109 light-years away in the constellation of Monoceros, orbiting the star HD 46375. With 79 Ceti b on March 29, 2000, it was joint first known extrasolar planet less massive than Saturn orbiting a normal star.[1] The planet is a "hot Jupiter", a type of planet that orbits very close to its parent star. In this case the orbital distance is only a tenth that of the planet Mercury. No transit of the planet has been detected, so its inclination must be less than 83°. Because the inclination is unknown, the true mass of the planet is not known.[2]

HD 46375 b
Discovery[1][2]
Discovered byCalifornia and
Carnegie Planet Search
Discovery siteW. M. Keck Observatory
Discovery dateMarch 29, 2000
Doppler spectroscopy
Orbital characteristics
Apastron0.0423 AU (6,330,000 km)
Periastron0.0373 AU (5,580,000 km)
0.0398 ± 0.0023 AU (5,950,000 ± 340,000 km)
Eccentricity0.063±0.026
3.023573±0.000065 d
0.008277947 y
144
2,451,071.53±0.19
114±24
Semi-amplitude33.65±0.74
StarHD 46375

    References
    1. "Keck astronomers discover planets smaller than saturn" (Press release). Kamuela, Hawaii: W. M. Keck Observatory. March 29, 2000. Retrieved August 13, 2019.
    2. Marcy, Geoffrey W.; et al. (2000). "Sub-Saturn Planetary Candidates of HD 16141 and HD 46375". The Astrophysical Journal Letters. 536 (1): L43–L46. arXiv:astro-ph/0004326. Bibcode:2000ApJ...536L..43M. doi:10.1086/312723. PMID 10849416.


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