Kepler-66

Kepler-66
Observation data; Epoch J2000 Equinox J2000
Constellation	Cygnus
Right ascension	19h 35m 55.5743s[1]
Declination	+46° 41′ 15.957″[1]
Apparent magnitude (V)	15.3
Characteristics
Spectral type	G0V
Astrometry
Proper motion (μ)	RA: −3.443±0.049[1] mas/yr ; Dec.: −8.784±0.045[1] mas/yr
Parallax (π)	0.8030 ± 0.0256[1] mas
Distance	4,100 ± 100 ly ; (1,250 ± 40 pc)
Details
Mass	1.038 ± 0.044 M☉
Radius	0.966 ± 0.042 R☉
Temperature	5962 ± 79 K K
Metallicity [Fe/H]	0.012 ± 0.003 dex
Rotation	10.527±0.011 days[2]
Age	1 ± 0.17 Gyr
Other designations
	KOI-1958, KIC 9836149[3]
Database references
SIMBAD	data
Extrasolar Planets; Encyclopaedia	data

Kepler-66 is a star with slightly more mass than the Sun in the NGC 6811 open cluster in the Cygnus constellation. It has one confirmed planet, slightly smaller than Neptune, announced in 2013.

Planetary system

The Kepler-66 planetary system
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	0.31 M_J	0.1352	17.815815	—	—	2.799976578 R_⊕

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Observation data Epoch J2000 Equinox J2000
Constellation	Cygnus
Right ascension	19^h 35^m 55.5743^s^[1]
Declination	+46° 41′ 15.957″^[1]
Apparent magnitude (V)	15.3
Characteristics
Spectral type	G0V
Astrometry

Proper motion (μ)	RA: 2999655700000000000♠−3.443±0.049^[1] mas/yr Dec.: 2999121599999999999♠−8.784±0.045^[1] mas/yr
Parallax (π)	0.8030 ± 0.0256^[1] mas
Distance	4,100 ± 100 ly (1,250 ± 40 pc)

Details

Mass	1.038 ± 0.044 `M`_☉
Radius	0.966 ± 0.042 `R`_☉
Temperature	5962 ± 79 K K
Metallicity [Fe/H]	0.012 ± 0.003 dex
Rotation	7001105270000000000♠10.527±0.011 days^[2]
Age	1 ± 0.17 Gyr

Other designations
KOI-1958, KIC 9836149^[3]
Database references
SIMBAD	data
Extrasolar Planets Encyclopaedia	data