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Exoplanetary Scratchpad

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Planets discovered during one of the Optical Gravitational Lensing Experiments which searches in the Galactic bulge.

OGLE Planets Web Pages[]

OGLE Planets In the News[]

Sample (Year)[]

Example Systems[]

Naming Convention: OGLE = Optical Gravitational Lensing Experiment; TR = Discovered using the transit technique; BLG = Found in the Galactic Bulge; L = Discovered using the Lensing technique
Discovered by Transit:

  • OGLE-TR-10 System - Contains a bloated Hot Jupiter expected to be losing its atmosphere. Noted for its similarity to the first transiting exoplanet. Thought to not be so bloated, but then confirmed to really be bloated. Found to have the lowest measured surface gravity of any of the transiting exoplanets, considerably less than Earth. 5th confirmed OGLE planet. The first star observed to experience a stellar flare during the transit of one of its planets. The star is suggested to be active and have a high x-ray luminosity.
  • OGLE-TR-56 System - Contains first planet discovered by transit and later confirmed by Dopplar Spectroscopy (rather than the other way around). The first OGLE planet confirmed with the Dopplar method. It is 6000 ly away, 10 times as far as any previous known planet, in a different arm of the galaxy. Also the first Very Hot Jupiter and the first non-inflated Hot Jupiter discovered. It may meet its doom in less than a million years. Planet has one of the first two ground-detected atmospheres. Has an atmosphere hotter than any other measured so far. Unlike other hot Jupiters observed, it is way too hot for clouds of silicon or iron to form which would keep it dark.
  • OGLE-TR-111 System - A yellow dwarf with a Hot Jupiter about half Jupiter's mass. Has the first OGLE-detected transiting "normal" Hot Jupiter (the others had unusually short periods). Data suggests the presence of a second planet, which, if confirmed, would make this the first system with more than one transiting planet.
  • OGLE-TR-113 System - A binary orange dwarf star 1800 ly away in a crowded star field in Carina. It contains the second discovered Very Hot Jupiter (34 hours, 0.023 au, 1.3 MJ) and one of the first discovered transiting planets. At one time it was the only known transiting Hot Jupiter with a surface gravity greater than Jupiter's. Between 2002 and 2009, its transit times were found to shorten by 60 ms per earth year. This indicates that it is slowly spiraling towards its sun, the first exoplanet found to be doing this, and may get ripped apart by its star in 1.4 million years, when its period is reduced to 10.8 hours. An alternate explanation may be that an unseen planetary companion is causing the timing differences.
  • OGLE-TR-132 System - Has the third discovered Very Hot Jupiter, validating the believability of the first one found. Transit timing analysis showed no variation, placing limits on further out planets.
  • OGLE-TR-182 System - Contains the 6th discovered OGLE transiting planet. It is considered a typical hot jupiter.
  • OGLE-TR-211 System - Contains the 7th discovered OGLE transiting planet. Has 20% greater radius than Jupiter and is thus classified as an inflated hot jupiter.

Discovered by Microlensing:

  • OGLE-2006-BLG-109L System - The first multi-planet system discovered via microlensing. Contains a Jupiter and Saturn analog, the first such system discovered in positions predicted by classical theories of solar system formation. The planets are inclined to each other.
  • OGLE-2003-BLG-235L System - A red dwarf around which the first planet discovered through microlensing was detected in 2004, shattering planetary distance records. It took a few years to actually image the star itself (by Hubble).
  • OGLE-2005-BLG-071L System - Template:OGLE-2005-BLG-071L System
  • OGLE-2005-BLG-169L System - Contains the second discovered icy Super-Earth or Neptunian. This planet was detected via the Microlense technique.
  • OGLE-2005-BLG-390L System - Has first discovered Icy Super Earth, which was detected via Micro-lensing tens of thousands of light years away and was the smallest known exoplanet around a normal star at the time.
  • OGLE2-TR-L9 System - First planet discovered around a rapidly rotating hot star and the hottest star with planets. Was detected by students while testing a method for investigating light fluctuations in the OGLE database. An inflated hot super Jupiter. Nicknamed "ReMeFra-1" for its discoverers.

See Also[]