Kepler-10

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Star
Kepler-10
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Dragon
Right ascension 19 h 02 m 43.06 s
declination + 50 ° 14 ′ 28.7 ″
Apparent brightness 11.2 mag
Typing
Known exoplanets 2
Spectral class G
Astrometry
Radial velocity (−98.12 ± 0.39) km / s
parallax (5.36 ± 0.02)  mas
distance (608 ± 2)  ly
(187 ± 1)  pc
Proper movement 
Rec. Share: (−18.39 ± 0.05)  mas / a
Dec. portion: (41.45 ± 0.05)  mas / a
Physical Properties
Dimensions (0.91 ± 0.02)  M ☉
radius (1.07 ± 0.01)  R ☉
Luminosity

(1.00   +0.06−0.05)  L ☉

Effective temperature (5710 ± 30)  K.
Metallicity [Fe / H] (−0.15 ± 0.04)
Age (10.6 ± 1.4) bill.  A
Other names
and catalog entries
2MASS catalog 2MASS J19024305 + 5014286 [1]
Other names KIC 11904151 • KOI 72

Kepler-10 is a Sun-like star of spectral class G in the constellation Dragon , 610 light years from Earth. It is orbited by at least two exoplanets .

Planetary system

Researchers at the Kepler telescope have found two planets orbiting the star. The telescope was able to use the transit method to measure the reduced brightness of the star when the planets pass in front of their star as seen from Earth.

The inner planet, Kepler-10b , was discovered in 2011 and is the first secured rocky planet found outside of the solar system. It orbits the star with a period of 20 hours and with 1.4 times the radius of the earth is somewhat larger and with 4.5 times the mass significantly more massive than the earth.

The outer planet, Kepler-10c , orbits the star once every 45 days. It has 2.2 times the radius of the earth and possibly up to 17 times the earth's mass. This would make it one of the most massive rocky planets ever found . The determination of the mass for Kepler-10c is, however, doubted by more recent work.

planet Mass
(in earth masses) 		Radius
(in earth radii) 		Density
(g / cm 3 ) 		Cycle
time
(days) 		Semi-major
axis
( AE ) 		Orbit inclination
( degree )
b 3.33 ± 0.49 1.47 ± 0.03 5.8 ± 0.8 0.8375 0.0168 ± 0.0003 84.4 ± 1.4
c 17.2 ± 1.9 2.35 ± 0.07 7.1 ± 1.0 45.2949 ± 0.0007 0.241 ± 0.005 89.65 ± 0.11

Web links

Commons : Kepler-10  - collection of pictures, videos and audio files

Individual evidence

  1. ↑ a b c d e Kepler-10. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed on March 22, 2020 .
  2. ↑ a b c d Xavier Dumusque, et al .: The Kepler-10 planetary system revisited by HARPS-N: A hot rocky world and a solid Neptune-mass planet . In: arXiv . May 30, 2014. arxiv : 1405.7881 .
  3. ↑ a b c d e f Kepler-10. In: NASA Exoplanet Archive . Retrieved March 22, 2020 .
  4. ^ Francois Fressin, et al .: Kepler-10c, a 2.2-Earth radius transiting planet in a multiple system . In: Cornell University . May 23, 2011. arxiv : 1105.4647 .
  5. ↑ a b c d Kepler: Table of Confirmed Planets. nasa.gov, accessed June 3, 2014 .
  6. ^ Astronomers Find a New Type of Planet: The "Mega-Earth". harvard.edu, June 2, 2014, accessed June 3, 2014 .
  7. ↑ V. Rajpaul: pinning down the mass of Kepler-10c: the importance of sampling and model comparison . In: Monthly Notices of the Royal Astronomical Society . 471, No. 1, July 2017, pp. L25-L130. arxiv : 1707.06192 . bibcode : 2017MNRAS.471L.125R . doi : 10.1093 / mnrasl / slx116 .