OGLE-TR-111

OGLE-TR-111
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]
Characteristics
Spectral type G[1]
Variable type planetary transit variable
Astrometry
Distance~5,000 ly
(~1,500 pc)
Absolute magnitude (MV)15.55
Details
Mass0.82 ± 0.15 M☉
Radius0.831 ± 0.031 R☉
Metallicity [Fe/H]0.12 ± 0.28 dex
Age>1.1 Gyr
Other designations
OGLE-TR-111, V759 Carinae
Database references
SIMBADdata

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] Because its apparent brightness changes when one of its planets transits, the star has been given the variable star designation V759 Carinae.

Planetary system

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.

Unconfirmed planet candidate

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
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		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

References

  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. S2CID 16553970.
  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. S2CID 16876570.