OGLE-TR-56b
Hot Jupiter orbiting OGLE-TR-56
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OGLE-TR-56b is an extrasolar planet located approximately 1500 parsecs or 5000 light years away in the constellation of Sagittarius, orbiting the star OGLE-TR-56. This planet was the first known exoplanet to be discovered with the transit method. The object was discovered by the OGLE project, announced on July 5, 2002[3] and confirmed on January 4, 2003 by the Doppler technique.[4] The period of this confirmed planet was the shortest until the confirmed discovery of WASP-12b on April 1, 2008.[5] The short period and proximity of the OGLE-TR-56 b to its host mean it belongs to a class of objects known as hot Jupiters.
confirmed: 4 January 2003
 Size comparison of OGLE-TR-56b with Jupiter. | |
| Discovery | |
|---|---|
| Discovered by | Dimitar D. Sasselov et al.[1] |
| Discovery date | 3 November 2002 confirmed: 4 January 2003 |
| Transit | |
| Orbital characteristics | |
| Apastron | 0.0225 AU (3,370,000 km) |
| Periastron | 0.0225 AU (3,370,000 km) |
| 0.0225 ± 0.0004 AU (3,366,000 ± 60,000 km) | |
| Eccentricity | 0 |
| 1.211909 ± 0.000001 d 29.08582 h | |
Average orbital speed | 203 |
| Inclination | 78.8 ± 0.5 |
| Star | OGLE-TR-56 |
| Physical characteristics | |
| 1.20±0.17[2] RJ | |
| Mass | 1.30±0.08[2] MJ |
Mean density | 0.75±0.34[2] ρJ |
| 22.3 ± 6.7 m/s2 (73 ± 22 ft/s2)[2] | |
| Temperature | 2140±120[2] K |
The planet is thought to be only 4 stellar radii from its star, and hot enough to have iron rain.[6]
