HD 20782
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Fornax |
| Right ascension | 03h 20m 03s |
| Declination | -28° 51' 14" |
| Apparent magnitude (V) | 7.38 |
| Distance | 117 ly (36 pc) |
| Spectral type | G3V |
| Other designations | |
|
HIP 15527
|
|
HD 20782 is a yellow main sequence star about 117 light-years away in the constellation Fornax. It is estimated to be 7.1 (± 4) billion years old, with a mass close to that of our Sun. An extrasolar planet was announced around this star in 2006.
[edit] HD 20782 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 1.36 ± 0.12 AU |
| Eccentricity | (e) | 0.92 ± 0.03 |
| Orbital period | (P) | 585.86 ± 0.03 d |
| Angular distance | (θ) | 37.757 mas |
| Longitude of periastron |
(ω) | 147 ± 3° |
| Time of periastron | (T0) | 2451687.1 ± 2.5 JD |
| Semi-amplitude | (K) | 115 ± 12 m/s |
| Physical characteristics | ||
| Mass | (m) | >1.8 ± 0.23 MJ |
| Discovery information | ||
| Discovery date | 2006 | |
| Discoverer(s) | Jones et al. | |
| Detection method | Radial velocity | |
| Discovery status | Published | |
HD 20782 b is an extrasolar planet orbiting its star in a highly eccentric orbit with a semi-major axis of 1.36 AU. The planet's extremely high eccentricity is comparable to that of HD 80606 b.
[edit] References
- Jones et al. (2006). "High-eccentricity planets from the Anglo-Australian Planet Search". Monthly Notices of the Royal Astronomical Society 369: 249–256. doi:.
[edit] External links
- Extrasolar Planets Encyclopaedia: HD 20782
- Astrophysics: High eccentricity planets from the Anglo-Australian Planet Search
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