CoRoT-20

CoRoT-20 is a star, which is located in the constellation Monoceros at a distance of about 4011 light years from the Earth. The star is orbited by at least two planets.

CoRoT-20

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Monoceros[1]
Right ascension	06h 30m 52.902s[2]
Declination	+00° 13′ 36.86″[2]
Apparent magnitude (V)	14.66[3]
Characteristics
Evolutionary stage	main sequence[2][3]
Spectral type	G2V[3]
Variable type	planetary transit
Astrometry
Radial velocity (Rv)	+69.47±9.37[2] km/s
Proper motion (μ)	RA: −0.263[2] mas/yr Dec.: −2.797[2] mas/yr
Parallax (π)	1.1216±0.0220 mas[2]
Distance	2,910 ± 60 ly (890 ± 20 pc)
Details
Mass	1.11[3] M☉
Radius	1.02[3] R☉
Luminosity	1.75[2] L☉
Surface gravity (log g)	4.20[3] cgs
Temperature	5,880[3] K
Metallicity [Fe/H]	0.14[3] dex
Age	100[3] Myr
Other designations
2MASS J06305289+0013369, CMC14 J063052.9+001336, UCAC2 31822344, UCAC3 181-42077, USNO-B1.0 0902-00091920, USNO-A2.0 0900-03054387, CoRoT-Exo 20[4]
Database references
SIMBAD	data

Characteristics

CoRoT-20 is a very young star of 14.66 magnitude by astronomical standards. Its age is estimated at approximately 100 million years.^[5] In terms of mass and radius, it is almost identical to the Sun. Its surface temperature is about 5880 kelvins. CoRoT-20 got its name thanks to the space telescope CoRoT, which discovered its two planets.

Planetary system

In 2011, a group of astronomers working within the CoRoT program announced the discovery of the planet CoRoT-20b and CoRoT-20c in this system.^[5] It is a hot gas giant, more than four times the mass of Jupiter. However, the planet's radius is only 84% of Jupiter's, which indicates an average high density. CoRoT-20b and c both orbit close to its parent star - at a distance of 0.09 AU The discovery of the planet was made by transit method.

The CoRoT-20 planetary system^[6]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	4.3 MJ	0.09	—	0.59	—	—
c	17 MJ	2.9	—	0.6	—	—