KELT-20

KELT-20
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cygnus
Right ascension 19h 38m 38.735s[1]
Declination +31° 31′ 09.22″[1]
Apparent magnitude (V) 7.58[2]
Characteristics
Evolutionary stage main sequence star
Spectral type A2V[3]
Variable type planetary transit
Astrometry
Proper motion (μ) RA: 3.096±0.068 mas/yr[1]
Dec.: −6.157±0.075 mas/yr[1]
Parallax (π)7.3015 ± 0.0433 mas[1]
Distance447 ± 3 ly
(137.0 ± 0.8 pc)
Details
Mass2.3[4] M☉
Radius1.6[4] R☉
Luminosity15.7[4] L☉
Surface gravity (log g)4.38[4] cgs
Temperature9,032[4] K
Metallicity [Fe/H]−0.02±0.07[5] dex
Age0.200[5] Gyr
Other designations
HD 185603, HIP 96618, MASCARA-2, KELT-20
Database references
SIMBADdata

KELT-20, also known as MASCARA-2, is an A2 main sequence star in the constellation of Cygnus, about 447 light years away.

  1. ^ a b c d 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.
  2. ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H. doi:10.1888/0333750888/2862. ISBN 978-0333750889.
  3. ^ Lund, Michael B.; et al. (2017). "KELT-20b: A Giant Planet with a Period of P ∼ 3.5 days Transiting the V ∼ 7.6 Early a Star HD 185603". The Astronomical Journal. 154 (5): 194. arXiv:1707.01518. Bibcode:2017AJ....154..194L. doi:10.3847/1538-3881/aa8f95.
  4. ^ a b c d e 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. eISSN 1538-3881.
  5. ^ a b Talens, G. J. J.; Justesen, A. B.; Albrecht, S.; McCormac, J.; Van Eylen, V.; Otten, G. P. P. L.; Murgas, F.; Palle, E.; Pollacco, D.; Stuik, R.; Spronck, J. F. P.; Lesage, A. -L.; Grundahl, F.; Fredslund Andersen, M.; Antoci, V.; Snellen, I. A. G. (2018). "MASCARA-2 b. A hot Jupiter transiting the mV = 7.6 A-star HD 185603". Astronomy and Astrophysics. 612. arXiv:1707.01500. Bibcode:2018A&A...612A..57T. doi:10.1051/0004-6361/201731512. S2CID 119422884.