Kepler-29

Kepler-29 is a Sun-like star in the northern constellation of Cygnus. It is located at the celestial coordinates: Right Ascension 19^h 53^m 23.6018^s, Declination +47° 29′ 28.437″.^[2] With an apparent visual magnitude of 15.456,^[3] this star is too faint to be seen with the naked eye. It is a solar analog, having a close mass, radius, and temperature as the Sun. Currently the age of the star has not been determined due to its 2780 light-year (850 parsecs) distance. As of 2016 no Jovian exoplanets of 0.9–1.4 M_J have been found at a distance of 5 AU. ^[7]

Kepler-29

Observation data Epoch J2000      Equinox J2000
Constellation	Cygnus[1]
Right ascension	19h 53m 23.6018s[2]
Declination	+47° 29′ 28.437″[2]
Apparent magnitude (V)	15.456±0.025[3]
Characteristics
Spectral type	G5V[4]
Astrometry
Proper motion (μ)	RA: 6.487(29) mas/yr[2] Dec.: 16.183(24) mas/yr[2]
Parallax (π)	1.1276±0.0229 mas[2]
Distance	2,890 ± 60 ly (890 ± 20 pc)
Details
Mass	0.761+0.024 −0.028[5] M☉
Radius	0.732+0.033 −0.031[5] R☉
Surface gravity (log g)	4.6±0.1[5] cgs
Temperature	5378±60[5] K
Metallicity [Fe/H]	−0.44±0.04[5] dex
Other designations
Gaia DR2 2086435189017387264, KOI-738, KIC 205071984, 2MASS J19532359+4729284[6]
Database references
SIMBAD	data
KIC	data

Kepler-29

Planetary system

In 2011 an analysis of the first four months of data from the Kepler space telescope detected 1235 planetary candidates two of which orbited this star.^[8] Later study of the transit-timing variations of the system lead to the confirmation of both planets.^[9] The planetary orbits are lying in Orbital resonance to each other, with orbital period ratio being exactly 7:9.^[10]

The Kepler-29 planetary system^[9][5]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	5.0+1.5 −1.3 M🜨	0.09	10.33966+0.00015 −0.00017	—	—	2.55±0.12 R🜨
c	4.5±1.1 M🜨	0.11	13.28633+0.00031 −0.00027	—	—	2.34+0.12 −0.11 R🜨