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Exoplanet List of exoplanets
Parent star
Star OGLE-2005-BLG-071L
Constellation Scorpius
Right ascension (α) 17h 50m 09s
Declination (δ) –34° 40′ 23″
Distance approx. 11000 ly
(approx. 3300 pc)
Spectral type M?
Observed separation
Projected separation (d) 3.6 ± 0.2
or 2.1 ± 0.1 AU
Physical characteristics
Mass (m) 3.8 +0.3

or 3.4 ± 0.3 MJ
Discovery information
Discovery date 27 May 2005
Discoverer(s) Udalski et al.
Discovery method Gravitational microlensing
Discovery status Published
Other designations
EWS 2005-BUL-071Lb, EWS 2005-BLG-071Lb
Database references
Extrasolar Planets
Exoplanet Archive data
Open Exoplanet Catalogue data

OGLE-2005-BLG-071Lb is a planet discovered by the Optical Gravitational Lensing Experiment (OGLE) and others in 2005, using gravitational microlensing.[1] According to the best fit model, it has about 3.5 times the mass of Jupiter and a projected separation of 3.6 astronomical units from the star. This would result in an effective temperature around 50 K, similar to that of Neptune. However, an alternative model which gives a slightly lower mass of 3.3 times that of Jupiter and a projected separation of 2.1 AU is only slightly less likely. It may be the most massive planet currently known around a red dwarf star (though only lower limits are known for those planets detected by the radial velocity method).[2]

See also[edit]


  1. ^ Udalski, A.; et al. (2005). "A Jovian-Mass Planet in Microlensing Event OGLE-2005-BLG-071". The Astrophysical Journal. 628 (2): L109–L112. Bibcode:2005ApJ...628L.109U. arXiv:astro-ph/0505451Freely accessible. doi:10.1086/432795. 
  2. ^ Dong, Subo; et al. (2009). "OGLE-2005-BLG-071Lb, the Most Massive M Dwarf Planetary Companion?". The Astrophysical Journal. 695 (2): 970–987. Bibcode:2009ApJ...695..970D. arXiv:0804.1354Freely accessible. doi:10.1088/0004-637X/695/2/970. 

Coordinates: Sky map 17h 50m 09s, −34° 40′ 23″