Kepler-36

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Star
Kepler-36
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation swan
Right ascension 19 h 25 m 0.03 s
declination + 49 ° 13 ′ 54.8 ″
Apparent brightness 11.94 mag
Typing
Known exoplanets 3
Spectral class G1IV
Astrometry
distance 1,530  ly
470  pc  
Physical Properties
Dimensions 1,071  M ☉
radius 1.626  R ☉
Effective temperature 5,911  K
Metallicity [Fe / H] −0.2
Other names
and catalog entries
Tycho catalog TYC 3551-2464-1 [1]Template: Infobox star / maintenance / specification of the TYC catalog
2MASS catalog 2MASS J19250004 + 4913545 [2]
Other names KOI-277, KIC 11401755, Kepler-36, WISE J192500.03 + 491354.5

Kepler-36 (also KOI-277 ) is a sub-giant the constellation Schwan , 1530 light-years from the sun is removed. The star has a planetary system with two known exoplanets .

properties

Kepler-36 has a higher mass and a larger radius than the sun. However, the star's density is only about 25% of the solar density, and it is also hotter and less metal-rich. According to the measurement data, Kepler-36 is a sub-giant and thus a star that is in the process of developing from the main sequence to a red giant . Its age is 2 to 3 billion years longer than that of the sun.

Planetary system

On June 21, 2012, the discovery of two planets around Kepler-36 was published based on observations made by the Kepler Space Telescope . The two planets are a super-earth and a mini-Neptune , each with probably around 4.5 and 8 Earth masses , which orbit their central star in around 14 and 16 days respectively.

The orbits of both planets are unusually close to each other, with a distance of only 0.013 AU . At their closest approach, Kepler-36b and Kepler-36c are only a little less than two million km apart, which is five times the distance between the earth and the moon and twenty times smaller than the closest distance between two planets in the solar system . Both planets are in an orbital resonance of 7: 6.

Planetary system from Kepler-42
Planet
(by distance from the star) 		Discovery
(year) 		Radius
(in ) 		Mass
(in M ⊕ ) 		Cycle time
(in days) 		Major semi-axis
(in AU ) 		eccentricity Orbit inclination
(in ° )
Kepler-36b 2012 1.486 ± 0.035 4.45 + 0.33−0.27 13.83989 +0.00082−0.00060 0.1153 ± 0.0015 <0.039 90.01 +0.69−0.71
Kepler-36c 2012 3.679 ± 0.054 8.08 +0.60−0.46 16.23855 +0.00038−0.00054 0.1283 ± 0.0016 <0.033 89.98 +0.54−0.53

Individual evidence

  1. ↑ a b SIMBAD: Kepler-36. Retrieved May 30, 2015 .
  2. ↑ a b c NASA Exoplanet Archive: Kepler 36.Retrieved May 30, 2015 .
  3. ↑ a b c d e f g h Carter et al .: Kepler-36: A Pair of Planets with Neighboring Orbits and Dissimilar Densities . arxiv : 1206.4718 .
  4. ^ A b National Aeronautics and Space Administration: Astronomers Discover Planetary Odd Couple. Retrieved May 30, 2015 .

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