OGLE-2006-BLG-109L
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 Location of the system marked in green. |
|
| Observation data Epoch 2000 |
|
|---|---|
| Constellation (pronunciation) |
Sagittarius |
| Right ascension | 17h 52m 35s |
| Declination | –30° 05' 16" |
| Astrometry | |
| Distance | ~4900 ly (~1500 pc) |
| Details | |
| Mass | ~0.5 M☉ |
| Temperature | ~4000 K |
OGLE-2006-BLG-109L is a star in the constellation of Sagittarius.
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.
[edit] Planetary system
| Planet (in order from star) |
Mass (MJ) |
Orbital period (days) |
Semimajor axis (AU) |
Eccentricity |
|---|---|---|---|---|
| b | 0.71 ± 0.08 | 1825 ± 365 | ? | ? |
| c | 0.27 ± 0.03 | 5100 ± 730 | ? | 0.11 |
[edit] References
- Discovery of a Jupiter/Saturn Analog with Gravitational Microlensing
- Information on the discovery from microFUN
- Detailed background information about the OGLE-2006-BLG-109L system
