KELT-20

KELT-20
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Cygnus
Right ascension	19h 38m 38.735s
Declination	+31° 31′ 09.22″
Apparent magnitude (V)	7.58
Characteristics
Evolutionary stage	main sequence star
Spectral type	A2V
Variable type	planetary transit
Astrometry
Proper motion (μ)	RA: 3.096±0.068 mas/yr ; Dec.: −6.157±0.075 mas/yr
Parallax (π)	7.3015±0.0433 mas
Distance	447 ± 3 ly ; (137.0 ± 0.8 pc)
Details
Mass	2.3 M☉
Radius	1.6 R☉
Luminosity	15.7 L☉
Surface gravity (log g)	4.38 cgs
Temperature	9,032 K
Metallicity [Fe/H]	−0.02±0.07 dex
Age	0.200 Gyr
Other designations
	HD 185603, HIP 96618, MASCARA-2, KELT-20
Database references
SIMBAD	data

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

Quick Facts Constellation, Right ascension ...

Observation data Epoch J2000.0 Equinox J2000.0
Constellation	Cygnus
Right ascension	19^h 38^m 38.735^s^[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]
Distance	447 ± 3 ly (137.0 ± 0.8 pc)

Details

Mass	2.3^[4] `M`_☉
Radius	1.6^[4] `R`_☉
Luminosity	15.7^[4] `L`_☉
Surface gravity (log g)	4.38^[4] cgs
Temperature	9,032^[4] K
Metallicity [Fe/H]	−0.02±0.07^[5] dex
Age	0.200^[5] Gyr

Other designations
HD 185603, HIP 96618, MASCARA-2, KELT-20
Database references
SIMBAD	data

Nomenclature