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 Location of OGLE-2006-BLG-109L (green) in the constellation of Sagittarius. |
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| Observation data Epoch J2000.0 Equinox J2000.0 |
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|---|---|
| Constellation | Sagittarius |
| Right ascension | 17h 52m 35s |
| Declination | –30° 05′ 16″ |
| Characteristics | |
| Spectral type | Unsure |
| Astrometry | |
| Distance | ~4,900 ly (~1,500 pc) |
| Details | |
| Mass | ~0.5 M☉ |
| Temperature | ~4,000 K |
OGLE-2006-BLG-109L is a currently unclassifiable star approximately 4,900 light-years away in the constellation of Sagittarius. As of 2008, two extrasolar planets were discovered around the star using gravitational microlensing. The two planets are at a distance from their star that make them suspected analogs of Jupiter and Saturn.
Planetary system
The star is surrounded by a planetary system consisting of at least two planets: b with a mass of approximately 0.71 of Jupiter and c with the mass of approximately 0.27 of Jupiter. Their mass ratios, distance ratios, and equilibrium temperatures are similar to those of Jupiter and Saturn in the solar system.
Both planets were discovered simultaneously by gravitational microlensing in a common effort by the Optical Gravitational Lensing Experiment, microFUN, MOA, PLANET and RoboNet collaborations, as announced on 14 February 2008.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
|---|---|---|---|---|
| b | 0.71 ± 0.08 MJ | 2.3 ± 0.2 | 1,825 ± 365 | ? |
| c | 0.27 ± 0.03 MJ | 4.6 ± 0.5 | 5,100 ± 730 | 0.11 |
See also
External links
- Britt, Robert Roy (2008-02-14). "Solar System Like Ours Found". Space.com. Retrieved on 2008-06-27.
- "Discovery of a Jupiter/Saturn Analog in OGLE-2006-BLG-109". MicroFUN. Retrieved on 2008-06-27.
- Dominik, Martin (2006-02-11). "The unlonely planets — Discovery of a Jupiter/Saturn analogue". ARTEMiS. Retrieved on 2008-06-27.
- Gaudi et al. (2008-02-14). "Discovery of a Jupiter/Saturn Analog with Gravitational Microlensing". arXiv. Retrieved on 2008-06-27.
- "Notes for star OGLE-06-109L". The Extrasolar Planets Encyclopaedia. Retrieved on 2008-06-27.
- Overbye, Dennis (2008-02-14). "Scientists Find Solar System Like Ours". The New York Times. Retrieved on 2008-06-27.
- Rincon, Paul (2008-04-06). "Solar System's 'look-alike' found". BBC News. Retrieved on 2008-06-27.
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