Extrasolar planet List of extrasolar planets
Artist's conception of OGLE-05-071Lb.
Parent star

<tr> <td colspan="2">Star</td> <td>OGLE-2005-BLG-071L</td></tr><tr> <td colspan="2">Constellation</td> <td>Scorpius</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>17h 50m 09s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>–34° 40′ 23″</td></tr><tr><td colspan="2">Distance</td><td>approx. 11000 ly
(approx. 3300 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>M?</td></tr> <tr style="background-color: #A0B0FF;"><td colspan="3" align=center>Observed separation</td></tr><tr> <td>Projected separation</td> <td style="text-align: center">(d)</td> <td>3.6 ± 0.2
or 2.1 ± 0.1 AU</td></tr>

Physical characteristics

<tr><td>Mass</td><td style="text-align: center">(m)</td><td>3.8 +0.3

or 3.4 ± 0.3 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>27 May 2005</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Udalski et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>Gravitational microlensing</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published</td></tr>

Other designations
EWS 2005-BUL-071Lb, EWS 2005-BLG-071Lb

<tr style="background-color: #A0B0FF;"><td align=center colspan=3>Database references</td></tr><tr valign=baseline><td colspan=2>Extrasolar Planets
</td><td>data</td></tr><tr><td colspan=2>SIMBAD</td><td>data</td></tr>

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 alsoEdit


  1. (2005). A Jovian-Mass Planet in Microlensing Event OGLE-2005-BLG-071. The Astrophysical Journal 628 (2): L109–L112.
  2. (2009). OGLE-2005-BLG-071Lb, the Most Massive M Dwarf Planetary Companion?. The Astrophysical Journal 695 (2): 970–987.

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

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