|Extrasolar planet||List of extrasolar planets|
|Right ascension||(α)||10h 53m 17.91s|
|Declination||(δ)||−61° 24′ 20.3″|
|Spectral type||G or K|
|Semimajor axis||(a)||0.047 ± 0.001 AU|
|Orbital period||(P)||4.01610 d|
|Time of periastron||(T0)||2,452,330.44867 JD|
|Mass||(m)||0.53 ± 0.11 MJ|
|Density||(ρ)||700 kg m-3|
|Surface gravity||(g)||12.5 m/s²|
|Discoverer(s)||Udalski et al.|
|Discovery method||Transit and Doppler|
OGLE-TR-111b is an extrasolar planet approximately 5,000 light-years away in the constellation of Carina (the Keel). The planet is currently the only confirmed planet orbiting the star OGLE-TR-111 (though a possible second planet is plausible).
In 2002 the Optical Gravitational Lensing Experiment (OGLE) survey detected that the light from the star periodically dimmed very slightly every 4 days, indicating a planet-sized body transiting the star. But since the mass of the object had not been measured, it was not clear that it was a true planet, low-mass red dwarf or something else.. In 2004 radial velocity measurements showed unambiguously that the transiting body is indeed a planet.
The planet is probably very similar to the other hot Jupiters orbiting nearby stars. Its mass is about half that of Jupiter and it orbits the star at a distance less than 1/20th that of Earth from the Sun.
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.
- Optical Gravitational Lensing Experiment
- List of extrasolar planets
- HD 209458 b
- Udalski, A. et al. (2002). "The Optical Gravitational Lensing Experiment. Planetary and Low-Luminosity Object Transits in the Carina Fields of the Galactic Disk". Acta Astronomica 52 (4): 317–359. arXiv:astro-ph/0301210. Bibcode:2002AcA....52..317U.
- Pont, F. et al. (2004). "The "missing link" : A 4-day period transiting exoplanet around OGLE-TR-111". Astronomy and Astrophysics 426: L15–L18. arXiv:astro-ph/0408499. Bibcode:2004A&A...426L..15P. doi:10.1051/0004-6361:200400066.
- Minniti, Dante et al. (2007). "Millimagnitude Photometry for Transiting Extrasolar Planetary Candidates. III. Accurate Radius and Period for OGLE-TR-111-b". The Astrophysical Journal 660 (1): 858–862. arXiv:astro-ph/0701356. Bibcode:2007ApJ...660..858M. doi:10.1086/512722.
Media related to OGLE-TR-111b at Wikimedia Commons
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