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″ |
| Distance | 117 ly (36 pc) | |
| Spectral type | G3V | |
| Orbital elements | ||
| Semi-major axis | (a) | 1.36 ± 0.12 AU |
| Periastron | (q) | 0.102 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 | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
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 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. Bibcode:2009MNRAS.392..641O. arXiv:0810.1589
. doi:10.1111/j.1365-2966.2008.14051.x. - ↑ 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. Bibcode:2006MNRAS.369..249J. arXiv:astro-ph/0603335 . doi:10.1111/j.1365-2966.2006.10298.x. web preprint
External links
- "HD 20782". Exoplanets. Retrieved 2008-08-29.
Coordinates: 
03h 20m 03.5776s, −28° 51′ 14.656″
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