OGLE-2005-BLG-169L
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Observation data Epoch J2000.0 |
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Constellation (pronunciation) |
Sagittarius |
Right ascension | 18h 06m 05s |
Declination | −30° 43' 57" |
Apparent magnitude (V) | +19.4 |
Distance | 8,800 ly (2,700 pc) |
Spectral type | M? |
Other designations | |
EWS 2005-BLG-169L
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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.
Contents |
[edit] OGLE-2005-BLG-169Lb
Extrasolar planet | List of extrasolar planets | |
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Orbital elements | ||
Observed separation | (d) | 2.7 AU |
Position angle | (φ) | 117.0° |
Closest approach | (t0) | 2,453,491.88 JD |
Physical characteristics | ||
Mass | (m) | 0.041 MJ (13 M⊕) |
Temperature | (T) | ~70 K |
Discovery information | ||
Discovery date | 2006 | |
Discoverer(s) | MicroFUN, PLANET/RoboNet, OGLE |
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Detection method | Gravitational microlensing | |
Discovery status | Published |
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 mass, 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.
[edit] See also
[edit] References
- Gould et al. (2006). "Microlens OGLE-2005-BLG-169 Implies That Cool Neptune-like Planets Are Common" ([dead link]). The Astrophysical Journal 644: L37–L40. doi: .(web Preprint)