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Exoplanet List of exoplanets
Exoplanet Comparison OGLE-TR-111 b.png
Size comparison of OGLE-TR-111b with Jupiter.
Parent star
Star OGLE-TR-111
Constellation Carina
Right ascension (α) 10h 53m 17.91s
Declination (δ) −61° 24′ 20.3″
Distance ~5,000 ly
(~1,500 pc)
Spectral type G or K
Orbital elements
Semi-major axis (a) 0.047 ± 0.001 AU
Eccentricity (e) 0
Orbital period (P) 4.01610 d
Inclination (i) 88.1°
Time of periastron (T0) 2,452,330.44867 JD
Physical characteristics
Mass (m) 0.53 ± 0.11 MJ
Radius (r) 1.067 RJ
Density (ρ) 700 kg m−3
Surface gravity (g) 12.5 m/s²
Discovery information
Discovery date 2002.[1]
Discoverer(s) Udalski et al.[1]
Discovery method Transit and Doppler
Discovery site  Poland
Discovery status Confirmed
Database references
Extrasolar Planets
Exoplanet Archive data
Open Exoplanet Catalogue data

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..[1] In 2004 radial velocity measurements showed unambiguously that the transiting body is indeed a planet.[2]

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.[3]

See also[edit]


External links[edit]

Media related to OGLE-TR-111b at Wikimedia Commons

Coordinates: Sky map 10h 53m 17.91s, −61° 24′ 20.3″