Kepler-66

Kepler-66
Observation data; Epoch J2000 Equinox J2000
Constellation	Cygnus
Right ascension	19h 35m 55.5743s
Declination	+46° 41′ 15.957″
Apparent magnitude (V)	15.3
Characteristics
Spectral type	G0V
Astrometry
Proper motion (μ)	RA: −3.464(23) mas/yr ; Dec.: −8.800(23) mas/yr
Parallax (π)	0.8430 ± 0.0205 mas
Distance	3,870 ± 90 ly ; (1,190 ± 30 pc)
Details
Mass	1.038 ± 0.044 M☉
Radius	0.966 ± 0.042 R☉
Temperature	5962 ± 79 K
Metallicity [Fe/H]	0.012 ± 0.003 dex
Rotation	10.527±0.011 days
Age	1 ± 0.17 Gyr
Other designations
	KOI-1958, KIC 9836149
Database references
SIMBAD	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	—	—	2.80 $R$ _🜨

^ ^a ^b ^c ^d Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
^ McQuillan, A.; Mazeh, T.; Aigrain, S. (2013). "Stellar Rotation Periods of The Kepler objects of Interest: A Dearth of Close-In Planets Around Fast Rotators". The Astrophysical Journal Letters. 775 (1). L11. arXiv:1308.1845. Bibcode:2013ApJ...775L..11M. doi:10.1088/2041-8205/775/1/L11. S2CID 118557681.
^ "KOI-1958". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 14 February 2018.

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: −3.464(23) mas/yr^[1] Dec.: −8.800(23) mas/yr^[1]
Parallax (π)	0.8430 ± 0.0205 mas^[1]
Distance	3,870 ± 90 ly (1,190 ± 30 pc)

Details

Mass	1.038 ± 0.044 `M`_☉
Radius	0.966 ± 0.042 `R`_☉
Temperature	5962 ± 79 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