CoRoT-8
Star in Aquila
From Wikipedia, the free encyclopedia
CoRoT-8 is a star in the constellation Aquila at a distance of about 1055 light-years away. At least one planet revolves around the star.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Aquila[1] |
| Right ascension | 19h 26m 21.2426s[2] |
| Declination | +01° 25′ 35.178″[2] |
| Characteristics | |
| Evolutionary stage | main sequence star[3] |
| Spectral type | K1V[3] |
| Variable type | planetary transit |
| Astrometry | |
| Proper motion (μ) | RA: 13.683(28) mas/yr[2] Dec.: −32.743(22) mas/yr[2] |
| Parallax (π) | 3.0903±0.0207 mas[2] |
| Distance | 1,055 ± 7 ly (324 ± 2 pc) |
| Details | |
| Mass | 0.89±0.04[4] M☉ |
| Radius | 0.802±0.014[4] R☉ |
| Luminosity | 0.41[2] L☉ |
| Surface gravity (log g) | 4.58±0.01[4] cgs |
| Temperature | 5143±178[5] K |
| Metallicity [Fe/H] | 0.22±0.11[5] dex |
| Rotational velocity (v sin i) | 2±1[3] km/s |
| Age | 1.7+2.3 −1.4[4] Gyr |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
CoRoT-8 is an orange dwarf which has 0.88 solar masses and 0.77 solar radius.[6] By astronomical standards, this is already a rather young star compared to the Sun: its age is about 3 billion years. It got its name in honor of the CoRoT space telescope, with the help of which its planetary companion was discovered.
In 2010, a group of astronomers working within the CoRoT program announced the discovery of the planet CoRoT-8b in this system. It is a hot gas giant, similar in mass and size to Saturn. The planet orbits at a distance of about 0.06 AU from the parent star, while making a complete revolution in 6.21 days.[3][4][7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.218 ± 0.034 MJ | 0.0636 ± 0.0014 | 6.212445 ± 0.000007 | <0.19[7] | 88.18±0.08° | 0.619+0.016 −0.017 RJ |
