OGLE-TR-113

OGLE-TR-113 is a dim, distant magnitude 16 binary star in the star fields of the constellation Carina. Because of its distance of about 1170 light years,^[4] and location in a crowded field it was not notable in any way. Its apparent brightness changes when one of its planets transits, so the star has been given the variable star designation V752 Carinae. Spectral type of the star is type K dwarf star, slightly cooler and less luminous than the Sun.^[2]

OGLE-TR-113

A light curve showing the February 25, 2008 planet transit across OGLE-TR-113. Adapted from Adams et al. (2010)[1]
Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Carina
Right ascension	10h 52m 24.40s[2]
Declination	–61° 26′ 48.5″[2]
Apparent magnitude (V)	16.08[2]
Characteristics
Spectral type	K
Apparent magnitude (V)	~16.08[2]
Apparent magnitude (I)	~14.42[2]
Apparent magnitude (K)	13.0 ±0.1[2]
Variable type	EP[3]
Astrometry
Distance	1,169 ± 63[4] ly (358.5±19.3[4] pc)
Absolute magnitude (MV)	15.55
Details
Mass	0.78 (± 0.02) M☉
Radius	0.77 (± 0.02) R☉
Metallicity	0.15 (± 0.10)[5]
Age	> 0.7 billion years
Other designations
V752 Carinae, SBC9 2451
Database references
SIMBAD	data

Planetary system

However, in 2002 the Optical Gravitational Lensing Experiment (OGLE) detected periodic dimming in the star's light curve indicating a transiting, planetary-sized object.^[6] Since low-mass red dwarfs and brown dwarfs may mimic a planet radial velocity measurements were necessary to calculate the mass of the body. In 2004 the object was proved to be a new transiting extrasolar planet, OGLE-TR-113b.^[7]

The OGLE-TR-113 planetary system

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	1.32 ± 0.19 MJ	0.0229 ± 0.0002	1.4324757 ± 0.0000013	0	—	—

See also

• OGLE-TR-132
• Optical Gravitational Lensing Experiment
• List of extrasolar planets