Kepler 102
Star Kepler-102 |
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AladinLite | |||||||
Observation dates equinox : J2000.0 , epoch : J2000.0 |
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Constellation | lyre | ||||||
Right ascension | 18 h 45 m 55.86 s | ||||||
declination | + 47 ° 12 ′ 28.8 ″ | ||||||
Apparent brightness | 12.07 ± 0.19 mag | ||||||
Typing | |||||||
Known exoplanets | 5 | ||||||
B − V color index | (0.51) | ||||||
Spectral class | K3 V | ||||||
Astrometry | |||||||
Radial velocity | (-27.67 ± 0.61) km / s | ||||||
parallax | (9.25 ± 0.02) mas | ||||||
distance | (352 ± 1) ly (108) pc |
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Proper movement | |||||||
Rec. Share: | (−41.14 ± 0.04) mas / a | ||||||
Dec. portion: | (−43.14 ± 0.04) mas / a | ||||||
Physical Properties | |||||||
Dimensions | 0.81 +0.04−0.09 M ☉ | ||||||
radius | 0.76 ± 0.07 R ☉ | ||||||
Luminosity |
0.3 ± 0.1 L ☉ |
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Effective temperature | 4,909 ± 41 K | ||||||
Metallicity [Fe / H] | 0.18 +0.42−0.47 | ||||||
Age | 1.41 billion a | ||||||
Other names and catalog entries |
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Kepler-102 is a star in the constellation Lyra . The star in a main sequence star of the spectral class K. Its mass and radius as well as its luminosity are aösp lower than those of the sun . The system is approximately 350 LJ from the sun. Kepler-102 has a planetary system made up of five known exoplanets .
Planetary system
The discovery of 49 exoplanet candidates around 22 stars, including Kepler-102, was published in January 2014 based on observations from the Kepler Space Telescope . The two innermost planets and the outermost planet have a smaller radius than the earth . The largest planet is Kepler-102d, whose mass could be determined from measurements of the radial velocity to be a little less than 9 Earth masses . All planets need far less time to orbit their central star than Mercury does to orbit the sun.
Planet (by distance from the star) |
Discovery (year) |
Radius (in ) |
Mass (in M ⊕ ) |
Cycle time (in days) |
Major semi-axis (in AU ) |
eccentricity |
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Kepler-102b | 2014 | 0.47 ± 0.02 | 0.41 ± 1.6 | 5,28696 | - | - |
Kepler-102c | 2014 | 0.58 ± 0.02 | <3.0 | 7.07142 | - | - |
Kepler-102d | 2014 | 1.18 ± 0.04 | 3.80 ± 1.8 | 10.3117 | - | - |
Kepler-102e | 2014 | 2.22 ± 0.07 | 8.93 ± 2.0 | 16.1457 | - | - |
Kepler-102f | 2014 | 0.88 ± 0.03 | 0.62 ± 3.3 | 27.4536 | - | - |
Individual evidence
- ↑ a b c d e f g KOI-82. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed on September 3, 2018 .
- ↑ a b c d e f g h i j k NASA Exoplanet Archive: Kepler 102.Retrieved September 3, 2018 .
- ^ A b Marcy, Geoffrey W. et al .: Masses, Radii, and Orbits of Small Kepler Planets: The Transition from Gaseous to Rocky Planets . arxiv : 1401.4195 .