KELT-10

KELT-10
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]
Distance617 ± 2 ly
(189.3 ± 0.6 pc)
Details[3]
Mass1.07+0.12
−0.15[5] M☉
Radius1.21+0.05
−0.03 R☉
Luminosity1.40±0.02[4] L☉
Surface gravity (log g)4.32+0.02
−0.03 cgs
Temperature5,948±74 K
Metallicity [Fe/H]+0.1±0.1 dex
Age4.5±0.7 Gyr
Other designations
CD−47°12635, KELT-10, TIC 269217040, Gaia DR2 6710517793025165696
Database references
SIMBADdata

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]

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

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.

The KELT-10 planetary system[3]
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

  1. ^ 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.
  2. ^ 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.
  3. ^ 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.
  4. ^ 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.
  5. ^ 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.

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