CoRoT-20
Star in Monoceros
From Wikipedia, the free encyclopedia
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.
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| 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 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.
| 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 | — | — |