KELT-10
Star in the constellation Telescopium
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KELT-10, also known as CD−47°12635, is a sun-like star in the southern constellation Telescopium. It has an apparent magnitude of 10.62,[3] making it readily visible in telescopes, but not to the naked eye. Parallax measurements from the Gaia spacecraft place the star at a distance of 617 light years;[2] it is currently receding with a radial velocity of 31.6 km/s.[5]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Telescopium[1] |
| Right ascension | 18h 58m 11.6095s[2] |
| Declination | −47° 00′ 11.664″[2] |
| Apparent magnitude (V) | +10.62[3] |
| Characteristics | |
| Spectral type | G0 V[4] |
| B−V color index | +0.72[3] |
| Variable type | PT |
| Astrometry | |
| Radial velocity (Rv) | 31.61±1.29[5] km/s |
| Proper motion (μ) | RA: +1.464 mas/yr[2] Dec.: −15.600 mas/yr[2] |
| Parallax (π) | 5.2834±0.0174 mas[2] |
| Distance | 617 ± 2 ly (189.3 ± 0.6 pc) |
| Details[4] | |
| Mass | 1.07+0.12 −0.15[6] M☉ |
| Radius | 1.21+0.05 −0.03 R☉ |
| Luminosity | 1.40±0.02[5] L☉ |
| Surface gravity (log g) | 4.32+0.02 −0.03 cgs |
| Temperature | 5,948±74 K |
| Metallicity [Fe/H] | +0.1±0.1 dex |
| Age | 4.5±0.7 Gyr |
| Other designations | |
| CD−47°12635, KELT-10, TIC 269217040, Gaia DR2 6710517793025165696 | |
| Database references | |
| SIMBAD | data |
KELT-10 has a stellar classification of G0 V,[4] indicating that it is a yellow dwarf like the Sun. However, the object is 7% more massive[6] and 21% larger.[4] It is also slightly hotter, with an effective temperature of 5,948 K[4] compared to the Sun's of 5,778 K. The star has a similar age, with an age of 4.5 billion years[4] and more luminous, having a luminosity 40% greater.[5] KELT-10's iron abundance is 123% that of the Sun,[4] consistent with a planetary host. However, this amount is poorly constrained.
Planetary system
In 2015, a "hot Jupiter" orbiting the star was discovered by the KELT-South telescope. KELT-10b orbits at a distance 10 time closer than Mercury orbits the Sun, and is bloated due to its orbit.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.68±0.04 MJ | 0.052±0.001 | 4.1662739±0.0000063 | 0 (assumed) | 88.61+0.86 −0.74° |
1.4±0.1 RJ |