83 Leonis Bb

Hypothetical view of 83 Leonis Bb rendered by Celestia
Discovery
Discovered by	Marcy, Butler, Vogtet al.
Discovery site	United States
Discovery date	25 January 2005
Detection method	Doppler spectroscopy
Orbital characteristics
Semi-major axis	0.12186 ± 0.00002 AU (18,230,000 ± 3,000 km)[1]
Eccentricity	0.13 ± 0.07[1]
Orbital period (sidereal)	17.054 ± 0.003[1]d
Time of periastron	2,450,449 ± 2[1]
Argument of periastron	196 ± 32[1]
Semi-amplitude	7.9 ± 0.6[1]
Star	83 Leonis B

83 Leonis Bb, also catalogued asHD 99492 b or abbreviated83 Leo Bb, is anextrasolar planet with a minimum mass of 1.5 Neptune mass. It is located approximately 59light-years away in theconstellation ofLeo (theLion). The planet was discovered in January 2005 by theCalifornia and Carnegie Planet Search team, who use theDoppler spectroscopy method to detect planets.^[2] It orbits in a close orbit around the star, completing one orbit in about 17days.^[1] The HARPS-N spectrograph discovered a second Neptune-like exoplanet in 2022 orbiting at 95 days.

• 16 Cygni Bb

• "83 Leonis AB".SolStation. Archived fromthe original on 25 July 2008. Retrieved2008-06-20.
• "Notes for planet HD 99492 b".Extrasolar Planets Encyclopaedia. Retrieved2008-06-20.

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