OGLE-TR-56

OGLE-TR-56

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Sagittarius
Right ascension	17^h 56^m 35.51^s[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

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]

Planetary system

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]

The OGLE-TR-56 planetary system

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

• Lists of exoplanets

References

1. "SIMBAD query result: V* V5157 Sgr -- Star showing eclipses by its planet". Centre de Données astronomiques de Strasbourg. Retrieved 2009-04-30.
2. Planet : OGLE-TR-56 b, Extrasolar Planets Encyclopaedia. Accessed on line August 22, 2008.
3. "General Catalogue of Variable Stars Query results". Sternberg Astronomical Institute, Moscow, Russia. Sternberg Astronomical Institute. Retrieved 2009-04-30.
4. 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.
5. 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.
6. 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.
7. 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

• "Notes for star OGLE-TR-56". Extrasolar Planets Encyclopaedia. Archived from the original on November 6, 2007. Retrieved 2008-08-22.