OGLE-TR-111b
Hot Jupiter orbiting OGLE-TR-111
title: "OGLE-TR-111b" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["hot-jupiters", "transiting-exoplanets", "exoplanets-discovered-in-2002", "giant-planets", "carina-(constellation)"] description: "Hot Jupiter orbiting OGLE-TR-111" topic_path: "general/hot-jupiters" source: "https://en.wikipedia.org/wiki/OGLE-TR-111b" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Hot Jupiter orbiting OGLE-TR-111 ::
::data[format=table title="Infobox planet"]
| Field | Value |
|---|---|
| name | OGLE-TR-111b |
| image | Exoplanet Comparison OGLE-TR-111 b.png |
| caption | Size comparison of OGLE-TR-111b with Jupiter |
| discoverer | Udalski et al. |
| discovery_site | Poland |
| discovered | 2002 |
| discovery_method | Transit and Doppler |
| apsis | astron |
| semimajor | 0.047 ± |
| eccentricity | 0 |
| period | 4.01610 d |
| inclination | 88.1 |
| time_periastron | 2,452,330.44867 |
| star | OGLE-TR-111 |
| mean_radius | 1.067 |
| mass | 0.53 ± 0.11 |
| density | 700 kg/m3 |
| surface_grav | 12.5 m/s2 |
| :: |
| name = OGLE-TR-111b | image = Exoplanet Comparison OGLE-TR-111 b.png | caption = Size comparison of OGLE-TR-111b with Jupiter | discoverer = Udalski et al. | discovery_site = Poland | discovered = 2002 | discovery_method = Transit and Doppler | apsis = astron | semimajor = 0.047 ± | eccentricity = 0 | period = 4.01610 d | inclination = 88.1 | time_periastron = 2,452,330.44867 | star = OGLE-TR-111 | mean_radius = 1.067 | mass = 0.53 ± 0.11 | density = 700 kg/m3 | surface_grav = 12.5 m/s2 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.
References
References
- (2007). "Millimagnitude Photometry for Transiting Extrasolar Planetary Candidates. III. Accurate Radius and Period for OGLE-TR-111-b". The Astrophysical Journal.
- (2004). "The "missing link" : A 4-day period transiting exoplanet around OGLE-TR-111". Astronomy and Astrophysics.
- (2002). "The Optical Gravitational Lensing Experiment. Planetary and Low-Luminosity Object Transits in the Carina Fields of the Galactic Disk". Acta Astronomica.
::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::