OGLE-2005-BLG-169L is a star about 2,700 parsecs away in the constellation Sagittarius. If it is a main sequence star, then it is most likely a red dwarf with about half of the mass of the Sun. Other possibilities are a white dwarf star, or (less likely) a neutron star or black hole.

In 2006, an extrasolar planet was detected around this star.

OGLE-2005-BLG-169Lb

OGLE-2005-BLG-169Lb is a planet discovered by the OGLE project using the gravitational microlensing method. Based on a most likely mass for the host star of 0.49 solar masses, the planet has a mass of 13 times that of Earth. Its mass and estimated temperature are close to those of Uranus. It is speculated that this planet may either be an ice giant like Uranus, or a "naked super-Earth" with a solid icy or rocky surface.

See also

• OGLE-2005-BLG-390L
• Optical Gravitational Lensing Experiment (OGLE)

External links

• arxiv.org Microlens OGLE-2005-BLG-169 Implies Cool Neptune-Like Planets are Common
• Extrasolar Encyclopedia: OGLE-05-169L
• Extrasolar Encyclopedia: OGLE-05-169L b
• SPACE.com: Newfound Ice World Alters Perceptions of Planetary Systems
• PLANET/RoboNet microlensing campaign: MICROLENSING EVENT OGLE-2005-blg-169

Sagittarius constellation | Red dwarfs | Extrasolar planets | Gravitational lensing

OGLE-2005-BLG-169L | OGLE-2005-BLG-169L