Kepler-18

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Coordinates: Sky map 19h 63m 19.06s, +46° 44′ 47.94″

Kepler-18

Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 19h 52m 19s
Declination +46° 44′ 47″
Apparent magnitude (V) 14.0
Characteristics
Astrometry
Proper motion (μ) RA: 19:52:19.0 mas/yr
Dec.: +46:44:47 mas/yr
Details
Mass 0.972 ± 0.042 M
Radius 1.108 ± 0.051 R
Temperature 5383 ± 44 K K
Metallicity [Fe/H] 0.2 ± 0.04 dex
Age 10 ± 2.3 Gyr
Other designations
Kepler-18
Database references
SIMBAD data
Extrasolar Planets
Encyclopaedia
data

Kepler-18 is a star with almost the same mass as the Sun in the Cygnus constellation with 3 confirmed planets, announced in 2011.

Planetary system[edit]

The Kepler-18 system
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b 6.898213 M 0.0447 3.504725 84.92 ± 0.26° 1.9642028 R
c 17.16606 M 0.0752 7.64159 87.68 ± 0.22° 5.376868 R
d 16.53028 M 0.1172 14.85888 88.07 ± 0.1° 6.803384 R


External links[edit]