 Size comparison of OGLE-TR-111b with Jupiter | |
| Discovery | |
|---|---|
| Discovered by | Udalskiet al.[1] |
| Discovery site |  Poland |
| Discovery date | 2002[1] |
| Transit and Doppler | |
| Orbital characteristics | |
| 0.047 ± 0.001 AU (7,030,000 ± 150,000 km) | |
| Eccentricity | 0 |
| 4.01610d | |
| Inclination | 88.1 |
| 2,452,330.44867 | |
| Star | OGLE-TR-111 |
| Physical characteristics | |
| 1.067RJ | |
| Mass | 0.53 ± 0.11MJ |
Meandensity | 0.70 g/cm3 |
| 12.5 m/s2 (1.27 g0) | |
OGLE-TR-111b is anextrasolar planet approximately 5,000light-years away in theconstellation ofCarina (theKeel). The planet is currently the only confirmed planet orbiting thestarOGLE-TR-111 (though apossible second planet is plausible).
In 2002 theOptical Gravitational Lensing Experiment (OGLE) survey detected that the light from the star periodically dimmed very slightly every 4days, indicating aplanet-sized bodytransiting the star. But since the mass of the object had not been measured, it was not clear that it was a true planet, low-massred dwarf or something else.[1]In 2004radial velocity measurements showed unambiguously that the transiting body is indeed a planet.[2]
The planet is probably very similar to the otherhot Jupiters orbiting nearby stars. Its mass is about half that ofJupiter and it orbits the star at a distance less than 1/20th that ofEarth from theSun.
OGLE-TR-111b has similar mass and orbital distance as the first transiting planet,HD 209458 b (Osiris). But unlike it, the planet has a radius comparable to Jupiter which is typical to other transiting planets detected by OGLE. However, those other planets tend to be more massive and orbit even closer than typical hot Jupiters. Therefore, this planet is an important "missing link" between the different types of transiting planets.[3]
Media related toOGLE-TR-111b at Wikimedia Commons
