KELT-3

KELT-3 is a star in the zodiac constellation Leo Minor. With an apparent magnitude of 9.82, it is too faint to be seen with the naked eye, but can be detected using a telescope. It is currently located around 681 light years away, based on parallax measurements.

KELT-3

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Leo Minor[1]
Right ascension	09h 54m 34.3869s[2]
Declination	+40° 23′ 16.974″[2]
Apparent magnitude (V)	9.82 ± 0.03[3]
Characteristics
Evolutionary stage	main sequence[2]
Spectral type	F5IV-V[4]
Variable type	planetary transit
Astrometry
Proper motion (μ)	RA: −28.217(20) mas/yr[2] Dec.: −24.068(22) mas/yr[2]
Parallax (π)	4.7860±0.0272 mas[2]
Distance	681 ± 4 ly (209 ± 1 pc)
Details[5]
Mass	1.301±0.046 M☉
Radius	1.583±0.036 R☉
Luminosity	3.04[6] L☉
Surface gravity (log g)	4.153±0.024 cgs
Temperature	6306+36 −35 K
Metallicity [Fe/H]	0.030+0.072 −0.066 dex
Age	3.0 ± 0.2[6] Gyr
Other designations
BD+41 2024, TYC 2996-683-1, 2MASS J09543439+4023170, GSC 02996-00683, SAO 43097
Database references
SIMBAD	data
Exoplanet Archive	data

Properties

KELT-3 is a late F-type main-sequence star with 27.7% more mass than the Sun, and is slightly larger than the latter. It is radiating 3 times the Sun's luminosity, and has a metallicity similar to the latter. It has an effective temperature of 6,304 K, which gives KELT-3 a yellow-white hue. It's also slightly younger than the Sun, with an age of 3 billion years. There is uncertainty about the star's age, it being an evolved star or not.^[6]

Since 2015, the star is suspected to have a stellar companion, at angular separation of 3.762±0.009 arcseconds.^[7]

Planetary system

In 2013, KELT discovered an eccentric hot Jupiter transiting the star. In the research paper, it is stated as one of the brightest transiting hosts. The light curves of the star have been observed during transits.^[6]

The KELT-3 planetary system

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	1.94±0.33[8] MJ	0.04120 ± 0.00067	2.7033902	0.202	84.25°	1.458+0.042 −0.041[5] RJ

See also

• KELT