HD 20782 b

HD 20782 b
Exoplanet List of exoplanets
Parent star
Star HD 20782
Constellation Fornax
Right ascension (α) 03h 20m 03.5776s
Declination (δ) –28° 51′ 14.656″
Distance117 ly
(36 pc)
Spectral type G3V
Orbital elements
Semi-major axis(a) 1.36 ± 0.12 AU
Periastron (q) 0.041 AU
Apastron (Q) 2.62 AU
Eccentricity (e) 0.97 ± 0.01[1]
Orbital period(P) 585.86 ± 0.03 d
(1.6040 y)
Argument of
periastron		 (ω) 147 ± 3°
Time of periastron (T0) 2451687.1 ± 2.5 JD
Semi-amplitude (K) 115 ± 12 m/s
Physical characteristics
Minimum mass(m sin i)1.8 ± 0.23 MJ
Discovery information
Discovery date March 14, 2006
Discoverer(s) Jones et al.
Discovery method Radial velocity
Discovery site Anglo-Australian Planet Search
Discovery status Published
Other designations
HIP 15527 b
Database references
Extrasolar Planets
Encyclopaedia		data
SIMBADdata
Exoplanet Archivedata
Open Exoplanet Cataloguedata

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.

See also

References

Notes
  1. 1 2 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. arXiv:0810.1589. Bibcode:2009MNRAS.392..641O. doi:10.1111/j.1365-2966.2008.14051.x.
  2. ↑ Selection Functions in Doppler Planet Searches
Source
  • Jones; Butler, R. Paul; Tinney, C. G.; Marcy, Geoffrey W.; Carter, Brad D.; Penny, Alan J.; McCarthy, Chris; Bailey, Jeremy (2006). "High-eccentricity planets from the Anglo-Australian Planet Search" (abstract). Monthly Notices of the Royal Astronomical Society. 369: 249–256. arXiv:astro-ph/0603335. Bibcode:2006MNRAS.369..249J. doi:10.1111/j.1365-2966.2006.10298.x. web preprint
  • "HD 20782". Exoplanets. Retrieved 2008-08-29.

Coordinates: 03h 20m 03.5776s, −28° 51′ 14.656″


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