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,[2] 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;[1] it is currently receding with a radial velocity of 31.6 km/s.[4]
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Telescopium |
| Right ascension | 18h 58m 11.6095s[1] |
| Declination | −47° 00′ 11.6643″[1] |
| Apparent magnitude (V) | +10.62[2] |
| Characteristics | |
| Spectral type | G0 V[3] |
| B−V color index | +0.72[2] |
| Variable type | PT |
| Astrometry | |
| Radial velocity (Rv) | 31.61±1.29[4] km/s |
| Proper motion (μ) | RA: +1.464 mas/yr[1] Dec.: −15.600 mas/yr[1] |
| Parallax (π) | 5.2834 ± 0.0174 mas[1] |
| Distance | 617 ± 2 ly (189.3 ± 0.6 pc) |
| Details[3] | |
| Mass | 1.07+0.12 −0.15[5] M☉ |
| Radius | 1.21+0.05 −0.03 R☉ |
| Luminosity | 1.40±0.02[4] 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 | |
| Database references | |
| SIMBAD | data |
KELT-10 has a stellar classification of G0 V,[3] indicating that it is a yellow dwarf like the Sun. However, the object is 7% more massive[5] and 21% larger.[3] It is also slightly hotter, with an effective temperature of 5,948 K[3] compared to the Sun's of 5,778 K. The star has a similar age, with an age of 4.5 billion years[3] and more luminous, having a luminosity 40% greater.[4] KELT-10's iron abundance is 123% that of the Sun,[3] consistent with a planetary host. However, this amount is poorly constrained.
Planetary System
editIn 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 |
References
edit- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b c Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
- ^ a b c d e f g h Kuhn, Rudolf B.; et al. (15 April 2016). "KELT-10b: the first transiting exoplanet from the KELT-South survey – a hot sub-Jupiter transiting aV= 10.7 early G-star". Monthly Notices of the Royal Astronomical Society. 459 (4): 4281–4298. arXiv:1509.02323. Bibcode:2016MNRAS.459.4281K. doi:10.1093/mnras/stw880. eISSN 1365-2966. ISSN 0035-8711.
- ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. ISSN 0004-6256.