| Discovery | |
|---|---|
| Discovered by | Meloet 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 ± 0.0013d | |
| 2,453,898.6289 ± 0.072 | |
| 0 | |
| Semi-amplitude | 7 ± 50 |
| Star | HD 219828 |
HD 219828 b is anextrasolar planet approximately 265light years away in theconstellation ofPegasus. This is aNeptune-mass planet at least 21 times more massive thanEarth. The planet's composition is unknown, but it may be similar to theice giantsUranus andNeptune, or alternatively it may be a mainly rocky likeSuper-Earth.[1]
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