OGLE-2005-BLG-390L b

OGLE -2005- BLG - 390L b, also briefly OGLE -05- 390L b called, is the name given to an exoplanet, of the red dwarf star OGLE -2005- BLG - 390L at a distance of 2.6 astronomical units (AU ) once encircled in ten Earth years. The star has about one-fifth the mass of the sun and is in the constellation Sagittarius. At a distance of about 6,500 parsecs ( 21,000 light years ) had the planet at the time of discovery, the largest known distance of an exoplanet to Earth. OGLE -2005- BLG - 390L b has about five times Earth's mass and thus, for example, less mass than the planet Neptune.

More details

The first indication of the planet was found on 10 August 2005 using the Danish 1.54 - telescope on the ESO La Silla Observatory in Chile. The discovery was made in January 2006 as a joint result of the four projects PLANET (Director: Jean -Philippe Beaulieu, Paris, and Martin Dominik, St. Andrews ), RoboNet (Director: Michael Bode, Liverpool, and Keith Horne, St. Andrews ) OGLE (Director: Andrzej Udalski, Warsaw) and MOA (Director: Phil Yock, Auckland ) published.

OGLE -2005- BLG - 390L b is valid due to its low mass as Earth-like exoplanet and is quite probably mostly of ice and rock. Due to the small size and relatively low radiation of his " mother star ", around which it revolves, and the great distance, the surface temperature of the planet is only about 50 Kelvin ( -220 ° C ), so that the development of life ( as we know it ) on the basis of liquid water is very unlikely.

Was first demonstrated to the celestial bodies by means of the micro-lens effect.