HD 20782 b

HD 20782 b
Discovery
Discovered by	Jones et al.
Discovery site	Anglo-Australian Planet Search
Discovery date	March 14, 2006
Detection method	Radial velocity
Orbital characteristics
Semi-major axis	1.36 ± 0.12 AU (203,000,000 ± 18,000,000 km)
Eccentricity	0.97 ± 0.01
Orbital period (sidereal)	585.86 ± 0.03 d
Time of periastron	2451687.1 ± 2.5
Argument of periastron	147 ± 3
Semi-amplitude	115 ± 12
Star	HD 20782

HD 20782 b is an extrasolar planet located approximately 117 light-years away in the constellation of Fornax, orbiting the star HD 20782.

This planet orbits in the most eccentric orbit known (as of November 2012),^[1] with a semi-major axis of 1.36 AU, and eccentricity e=0.97+/-0.01.^[2] As a result, it also has one of the most extreme temperature swings.

^ ^a ^b S. J. O'Toole; C. G. Tinney; H. R. A. Jones; R. P. Butler; G. W. Marcy; B. Carter; J. Bailey (2009). "Selection Functions in Doppler Planet Searches". MNRAS. 392, 641 (2): 641–654. arXiv:0810.1589. Bibcode:2009MNRAS.392..641O. doi:10.1111/j.1365-2966.2008.14051.x. S2CID 7248338.
^ Selection Functions in Doppler Planet Searches

[Functions2009-1] S. J. O'Toole; C. G. Tinney; H. R. A. Jones; R. P. Butler; G. W. Marcy; B. Carter; J. Bailey (2009). "Selection Functions in Doppler Planet Searches". MNRAS. 392, 641 (2): 641–654. arXiv:0810.1589. Bibcode:2009MNRAS.392..641O. doi:10.1111/j.1365-2966.2008.14051.x. S2CID 7248338.

[2] Selection Functions in Doppler Planet Searches

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