OGLE-TR-56

OGLE-TR-56

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
Extrasolar Planets Encyclopaedia	data

OGLE-TR-56 is a dim, distant, magnitude 17 Sun-like star located approximately 1500 parsecs away in the constellation of Sagittarius.^[1] This star is listed as a 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, the extrasolar planet OGLE-TR-56b was discovered transiting the star.^[5] At that time, it was the shortest period planet discovered.^[6]

The OGLE-TR-56 system

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity
b	1.29 ± 0.12[4] MJ	0.0225 ± 0.0004[2]	1.211909 ± 0.000001[4]	0

See also

• List of extrasolar planets

References

1. ^ ^{a b c d} "SIMBAD query result: V* V5157 Sgr -- Star showing eclipses by its planet". Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=OGLE-TR-56. Retrieved 2009-04-30. 
2. ^ ^{a b} 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. http://www.sai.msu.su/groups/cluster/gcvs/cgi-bin/search.cgi?search=+V5157+Sgr+. Retrieved 2009-04-30. 
4. ^ ^{a b c d} The "666" collaboration on OGLE transits. I. Accurate radius of the planets OGLE-TR-10b and OGLE-TR-56b with VLT deconvolution photometry, F. Pont et al., Astronomy and Astrophysics 465, #3 (April 2007), pp. 1069–1074, Bibcode: 2007A&A...465.1069P, doi:10.1051/0004-6361:20066645.
5. ^ ^{a b} Udalski et al.; Zebrun, K.; Szymanski, M.; Kubiak, M.; Soszynski, I.; Szewczyk, O.; Wyrzykowski, L.; Pietrzynski, G. (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: 115–128. arXiv:astro-ph/0207133. Bibcode 2002AcA....52..115U. http://acta.astrouw.edu.pl/Vol52/n2/a_52_2_1.html. 
6. ^ Konacki et al.; Torres, Guillermo; Sasselov, Dimitar D.; Jha, Saurabh (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. http://www.iop.org/EJ/article/0004-637X/597/2/1076/58497.html. 

External links

• Konacki et al.; Torres, Guillermo; Jha, Saurabh; Sasselov, Dimitar D. (2003). "An extrasolar planet that transits the disk of its parent star". Nature 421 (6922): 507–509. Bibcode 2003Natur.421..507K. doi:10.1038/nature01379. PMID 12556885. http://www.nature.com/nature/journal/v421/n6922/abs/nature01379.html. (web Preprint)
• "Notes for star OGLE-TR-56". The Extrasolar Planets Encyclopaedia. http://exoplanet.eu/star.php?st=OGLE-TR-56. Retrieved 2008-08-22. 
• "OGLE-TR-56". Extrasolar Visions. http://www.extrasolar.net/planettour.asp?StarCatId=normal&StarId=200. Retrieved 2008-08-22. 

Coordinates: 17^h 56^m 35.51^s, −29° 32′ 21.2″