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Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Carina
Right ascension 10h 53m 17.91s[1]
Declination −61° 24′ 20.3″[1]
Apparent magnitude (V) 16.96[1]
Spectral type G[1]
Variable type planetary transit variable
Distance~5,000 ly
(~1,500 pc)
Absolute magnitude (MV)15.55
Mass0.82 ± 0.15 M
Radius0.831 ± 0.031 R
Metallicity [Fe/H]0.12 ± 0.28 dex
Age>1.1 Gyr
Database references
Extrasolar Planets

OGLE-TR-111 is a yellow dwarf star approximately 5,000 light-years away in the constellation of Carina (the Keel). Having an apparent magnitude of about 17, this distant and dim star has not yet been cataloged.[1]

Planetary system[edit]

In 2002 the Optical Gravitational Lensing Experiment (OGLE) survey detected that the light from the star periodically dimmed very slightly every 4 days, indicating a planet-sized body transiting the star. But since the mass of the object had not been measured, it was not clear that it was a true planet, low-mass red dwarf or something else.[2] In 2004 radial velocity measurements showed unambiguously that the transiting body is indeed a planet.[3]

The planet is probably very similar to the other "hot Jupiters" orbiting nearby stars. Its mass is about half that of Jupiter and it orbits the star at a distance less than 1/20th that of Earth from the Sun.

In 2005, evidence of another transit was announced. Planet "OGLE-TR-111c" is a possible extrasolar planet orbiting the star. It was first proposed in 2005 based on preliminary evidence from the Optical Gravitational Lensing Experiment (OGLE) survey. More data is required to confirm this planet candidate. If it is confirmed, OGLE-TR-111 would become one of the first stars with a pair of transiting planets.[4]

The OGLE-TR-111 planetary system
(in order from star)
Mass Semimajor axis
Orbital period
Eccentricity Inclination Radius
b 0.53 ± 0.11 MJ 0.047 ± 0.001 4.0144479 ± 4.1e-06 0
c (unconfirmed) 0.7 ± 0.2 MJ 0.12 ± 0.01 16.0644 ± 0.0050 0

See also[edit]


  1. ^ a b c d e "SIMBAD query result: OGLE-TR 111 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-04-29.
  2. ^ Udalski, A.; et al. (2002). "The Optical Gravitational Lensing Experiment. Planetary and Low-Luminosity Object Transits in the Carina Fields of the Galactic Disk". Acta Astronomica. 52 (4): 317–359. arXiv:astro-ph/0301210. Bibcode:2002AcA....52..317U.
  3. ^ Pont, F.; et al. (2004). "The "missing link" : A 4-day period transiting exoplanet around OGLE-TR-111". Astronomy and Astrophysics. 426: L15–L18. arXiv:astro-ph/0408499. Bibcode:2004A&A...426L..15P. doi:10.1051/0004-6361:200400066.
  4. ^ Minniti, Dante; et al. (2007). "Millimagnitude Photometry for Transiting Extrasolar Planetary Candidates. III. Accurate Radius and Period for OGLE-TR-111-b". The Astrophysical Journal. 660 (1): 858–862. arXiv:astro-ph/0701356. Bibcode:2007ApJ...660..858M. doi:10.1086/512722.

External links[edit]

Coordinates: Sky map 10h 53m 17.91s, −61° 24′ 20.3″