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OGLE-TR-56

Coordinates: Sky map 17h 56m 35.51s, −29° 32′ 21.2″
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OGLE-TR-56

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 ICRS
Constellation Sagittarius[2]
Right ascension 17h 56m 35.51s[3]
Declination −29° 32′ 21.2″[3]
Apparent magnitude (V) 16.560[3]
Characteristics
Spectral type G[4]
Variable type EP[5]
Astrometry
Distance~5,000 ly
(~1,500 pc)
Details
Mass1.17±0.04[6] M☉
Radius1.32±0.06[6] R☉
Other designations
V5157 Sagittarii, SBC9 2452
Database references
SIMBADdata

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.[3] 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.[7] The eclipses were detected by the Optical Gravitational Lensing Experiment (OGLE) team analysing data collected in 2001.[8]

Planetary system

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In 2002, a possible planet was discovered transiting the star,[7] and after additional observations to rule out false positives, it was confirmed. At the time of discovery it was the shortest-period planet.[9][10]

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[6] MJ 0.0225±0.0004[4] 1.211909±0.000001[6] 0 — 1.30±0.05[6] RJ

See also

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References

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  1. ↑ Adams, E. R.; López-Morales, M.; Elliot, J. L.; Seager, S.; Osip, D. J.; Holman, M. J.; Winn, J. N.; Hoyer, S.; Rojo, P. (November 2011). "Twenty-one New Light Curves of OGLE-TR-56b: New System Parameters and Limits on Timing Variations". The Astrophysical Journal. 741 (2): 102–113. arXiv:1108.4423. Bibcode:2011ApJ...741..102A. doi:10.1088/0004-637X/741/2/102.
  2. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
  3. 1 2 3 4 "SIMBAD query result: V* V5157 Sgr -- Star showing eclipses by its planet". Centre de Données astronomiques de Strasbourg. Retrieved 2009-04-30.
  4. 1 2 Planet : OGLE-TR-56 b, Extrasolar Planets Encyclopaedia. Accessed on line August 22, 2008.
  5. ↑ "General Catalogue of Variable Stars Query results". Sternberg Astronomical Institute, Moscow, Russia. Sternberg Astronomical Institute. Retrieved 2009-04-30.
  6. 1 2 3 4 5 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.
  7. 1 2 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.
  8. ↑ Udalski, A. (June 2002). "New Transits from the Ogle-III Survey". IAU Circular (2). Bibcode:2002IAUC.7925....2U.
  9. ↑ 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.
  10. ↑ 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.
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