CoRoT-20
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Monoceros |
| Right ascension | 06h 30m 52.902s |
| Declination | +00° 13′ 36.86″ |
| Apparent magnitude (V) | 14.66 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | G2V |
| Variable type | planetary transit |
| Astrometry | |
| Radial velocity (Rv) | +69.47±9.37 km/s |
| Proper motion (μ) | RA: −0.263 mas/yr Dec.: −2.797 mas/yr |
| Parallax (π) | 1.1216±0.0220 mas |
| Distance | 2,910 ± 60 ly (890 ± 20 pc) |
| Details | |
| Mass | 1.11 M☉ |
| Radius | 1.02 R☉ |
| Luminosity | 1.75 L☉ |
| Surface gravity (log g) | 4.20 cgs |
| Temperature | 5,880 K |
| Metallicity [Fe/H] | 0.14 dex |
| Age | 100 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 | |
| Database references | |
| SIMBAD | data |
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.
Characteristics
CoRoT-20 is a very young star of 14.66 magnitude by astronomical standards. Its age is estimated at 100 million years. 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. 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 | — | — |
References
- ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
- 1 2 3 4 5 6 7 8 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- 1 2 3 4 5 6 7 8 9 Raetz, St; Heras, A. M.; Fernández, M.; Casanova, V.; Marka, C. (2019). "Transit analysis of the CoRoT-5, CoRoT-8, CoRoT-12, CoRoT-18, CoRoT-20, and CoRoT-27 systems with combined ground- and space-based photometry". Monthly Notices of the Royal Astronomical Society. 483 (1): 824. arXiv:1812.01536. Bibcode:2019MNRAS.483..824R. doi:10.1093/mnras/sty3085.
- ↑ "CoRoT-20". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2025-05-17.
- 1 2 Deleuil, M.; et al. (2012). "Transiting exoplanets from the CoRoT space mission. XX. CoRoT-20b: A very high density, high eccentricity transiting giant planet". Astronomy and Astrophysics. 538: A145. arXiv:1109.3203. Bibcode:2012A&A...538A.145D. doi:10.1051/0004-6361/201117681.
- ↑ "CoRoT-20 Planets in the system". Retrieved February 25, 2019.
