Kepler-182

Kepler-182 is a star in the constellation of Cygnus. The star is notable for having two planets in the circumstellar habitable zone.^{[citation needed]}

Kepler-182

Observation data Epoch J2000      Equinox J2000
Constellation	Cygnus[1]
Right ascension	19h 19m 19.239s[2]
Declination	+50° 35′ 10.44″[2]
Apparent magnitude (V)	14.9[3]
Characteristics
Evolutionary stage	subgiant[2]
Spectral type	F3[4]
Astrometry
Proper motion (μ)	RA: −7.566 mas/yr[2] Dec.: −7.217 mas/yr[2]
Parallax (π)	0.6117±0.0167 mas[2]
Distance	5,300 ± 100 ly (1,630 ± 40 pc)
Details[5]
Mass	1.07[3] M☉
Radius	1.43[3] R☉
Luminosity	2.21[3] L☉
Surface gravity (log g)	4.16[3] cgs
Temperature	5,883[3] K
Metallicity [Fe/H]	0.07[4] dex
Rotation	44 days[6]
Rotational velocity (v sin i)	3.6[6] km/s
Age	5.0[6] Gyr
Other designations
KOI-546, KIC 12058931, 2MASS J19191922+5035104
Database references
SIMBAD	data
KIC	data

With a mass the same as the Sun's and an age of five billion years, Kepler-182 has exhausted its core hydrogen and expanded away from the main sequence. It is now a subgiant contracting towards the red giant branch. It has a radius of 1.4 R_☉ and an effective temperature of 5,883 K, giving a bolometric luminosity of 2.2 L_☉.^[3]

Two exoplanets orbit it. The first, Kepler-182b, has a radius of 0.23 R_J and orbits the parent star every 9.8 days. The second, Kepler-182c, has a radius of 0.306 R_J and orbits the parent star every 20.7 days.^[5]

The Kepler-182 planetary system^[5]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	—	0.096	9.825792 ± 0.000062	—	—	0.23 ± 0.105 RJ
c	—	0.157	20.684342 ± 0.000097	—	—	0.306 ± 0.136 RJ