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.[1] 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.[5]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 17h 56m 35.51s[1] |
| Declination | –29° 32′ 21.2″[1] |
| Apparent magnitude (V) | 16.560<[1] |
| Characteristics | |
| Spectral type | G[2] |
| Variable type | EP[3] |
| Astrometry | |
| Distance | ~5,000 ly (~1,500 pc) |
| Details | |
| Mass | 1.17 ± 0.04[4] M☉ |
| Radius | 1.32 ± 0.06[4] R☉ |
| Other designations | |
V5157 Sagittarii, SBC9 2452 | |
| Database references | |
| SIMBAD | data |
Planetary system edit
In 2002, a possible planet was discovered transiting the star,[5] and after additional observations to rule out false positives, it was confirmed. At the time of discovery it was the shortest-period planet.[6][7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 1.29 ± 0.12[4] MJ | 0.0225 ± 0.0004[2] | 1.211909 ± 0.000001[4] | 0 | — | — |
See also edit
References edit
- ^ a b c d "SIMBAD query result: V* V5157 Sgr -- Star showing eclipses by its planet". Centre de Données astronomiques de Strasbourg. Retrieved 2009-04-30.
- ^ a b Planet : OGLE-TR-56 b, Extrasolar Planets Encyclopaedia. Accessed on line August 22, 2008.
- ^ "General Catalogue of Variable Stars Query results". Sternberg Astronomical Institute, Moscow, Russia. Sternberg Astronomical Institute. Retrieved 2009-04-30.
- ^ a b c d Pont, F.; et al. (2007). "The "666" collaboration on OGLE transits I. Accurate radius of the planets OGLE-TR-10b and OGLE-TR-56b with VLT deconvolution photometry". Astronomy and Astrophysics. 465 (3): 1069–1074. arXiv:astro-ph/0610827. Bibcode:2007A&A...465.1069P. doi:10.1051/0004-6361:20066645. S2CID 115760695.
- ^ a b Udalski, A.; et al. (2002). "The Optical Gravitational Lensing Experiment. Search for Planetary and Low-Luminosity Object Transits in the Galactic Disk. Results of 2001 Campaign - Supplement". Acta Astronomica. 52 (2): 115–128. arXiv:astro-ph/0207133. Bibcode:2002AcA....52..115U.
- ^ Konacki, Maciej; et al. (2003). "High-Resolution Spectroscopic Follow-up of OGLE Planetary Transit Candidates in the Galactic Bulge: Two Possible Jupiter-Mass Planets and Two Blends". The Astrophysical Journal. 597 (2): 1076–1091. arXiv:astro-ph/0306542. Bibcode:2003ApJ...597.1076K. doi:10.1086/378561. S2CID 53610157.
- ^ Konacki, Maciej; et al. (2003). "An extrasolar planet that transits the disk of its parent star" (PDF). Nature. 421 (6922): 507–509. Bibcode:2003Natur.421..507K. doi:10.1038/nature01379. PMID 12556885. S2CID 1784939.
External links edit
- "Notes for star OGLE-TR-56". Extrasolar Planets Encyclopaedia. Archived from the original on November 6, 2007. Retrieved 2008-08-22.
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