Back HD 219828 b Arabic HD 219828 b German HD 219828 b Spanish HD 219828 b ID HD 219828 b Japanese HD 219828 b Korean HD 219828 b Portuguese HD 219828 b Chinese
| Discovery | |
|---|---|
| Discovered by | Melo et al. |
| Discovery site |  Chile |
| Discovery date | Feb 18, 2007 |
| radial velocity | |
| Orbital characteristics | |
| 0.052 AU (7,800,000 km) | |
| Eccentricity | 0.021 |
| 3.8335 ± 0.0013 d | |
| 2,453,898.6289 ± 0.072 | |
| 0 | |
| Semi-amplitude | 7 ± 50 |
| Star | HD 219828 |
HD 219828 b is an extrasolar planet approximately 265 light years away in the constellation of Pegasus. This is a Neptune-mass planet at least 21 times more massive than Earth. The planet's composition is unknown, but it may be similar to the ice giants Uranus and Neptune, or alternatively it may be a mainly rocky like Super-Earth.[1]
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