OGLE-TR-56
Star in the constellation Sagittarius
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OGLE-TR-56 is a dim, distant, magnitude 17 Sun-like star located approximately 1,500 parsecs (4,900 light-years) away in the constellation of Sagittarius.[2] This star is listed as an eclipsing type variable star with the eclipse due to the passage of the planet as noted in the discovery papers.[6] The eclipses were detected by the Optical Gravitational Lensing Experiment (OGLE) team analysing data collected in 2001.[7]
A light curve showing the May 14, 2008 planet transit across OGLE-TR-56. Adapted from Adams et al. (2011)[1] | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 17h 56m 35.51s[2] |
| Declination | −29° 32′ 21.2″[2] |
| Apparent magnitude (V) | 16.560[2] |
| Characteristics | |
| Spectral type | G[3] |
| Variable type | EP[4] |
| Astrometry | |
| Distance | ~5,000 ly (~1,500 pc) |
| Details | |
| Mass | 1.17±0.04[5] M☉ |
| Radius | 1.32±0.06[5] R☉ |
| Other designations | |
| V5157 Sagittarii, SBC9 2452 | |
| Database references | |
| SIMBAD | data |
Planetary system
In 2002, a possible planet was discovered transiting the star,[6] and after additional observations to rule out false positives, it was confirmed. At the time of discovery it was the shortest-period planet.[8][9]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination (°) |
Radius |
|---|---|---|---|---|---|---|
| b | 1.29±0.12[5] MJ | 0.0225±0.0004[3] | 1.211909±0.000001[5] | 0 | — | 1.30±0.05[5] RJ |
