Kepler-33

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Star
Kepler-33
Kepler-33 compared to the sun (left)
Kepler-33 compared to the sun (left)
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation swan
Right ascension 19 h 16 m 18.61 s
declination + 46 ° 00 ′ 18.8 ″
Apparent brightness 13.74 mag
Typing
Known exoplanets 5
Spectral class G1IV
Astrometry
Radial velocity 14.09 ± 0.1 km / s
Proper movement 
Rec. Share: −0.39  mas / a
Dec. portion: −14.96  mas / a
Physical Properties
Dimensions 1.219 +0.063−0.121 M ☉
radius 1.82 +0.14−0.18 R ☉
Luminosity

0.556 ± 0.080  L ☉

Effective temperature 5,904 ± 47  K
Metallicity [Fe / H] +0.0250 ± 0.0019
Age 4.27 +0.74−1.03Billion  a
Other names
and catalog entries
2MASS catalog 2MASS J19161861 + 4600187 [1]
Other names WISE J191618.60 + 460018.7, GSC 03542-01616, KIC 9458613, KOI-707, Kepler-33

Kepler-33 is a sub-giant in the constellation Swan , which has a planetary system with five known exoplanets . The star's distance from the solar system is unknown.

properties

Kepler-33 is a slightly more massive and larger star than the Sun and evolves away from the main sequence .

Planetary system

On January 26, 2012, an astronomical team led by Jack Jonathan Lissauer published the discovery of five planets orbiting Kepler-33 based on the observations made by the Kepler space telescope . Their orbits are all very close to the central star. The respective radius of the planets moves in an order of magnitude between about 1.74 and about 5.35 earth radii . The smallest and innermost planet, Kepler-33b , according to the model calculation of the discovery team, probably has a greater orbital inclination and orbital eccentricity than the planets further out, comparable to the planet Mercury in the solar system.

Planetary system from Kepler-33
Planet
(by distance from the star) 		Discovery
(year) 		Radius
(in ) 		Cycle time
(in days) 		Major semi-axis
(in AU ) 		Orbit inclination (in °)
Kepler-33b 2012 1.74 ± 0.18 5.66793 ± 0.00012 0.0677 ± 0.0014 86.39 +0.96−1.62
Kepler-33c 2012 3.20 ± 0.30 13.17562 ± 0.00014 0.1189 ± 0.0025 88.19 +0.58−1.06
Kepler-33d 2012 5.35 ± 0.49 21.77596 ± 0.00011 0.1662 ± 0.0035 88.71 +0.61−0.48
Kepler-33e 2012 4.02 ± 0.38 31.78440 ± 0.00039 0.2138 ± 0.0045 88.94 +0.45−0.35
Kepler-33f 2012 4.46 ± 0.41 41.02902 ± 0.00042 0.2535 ± 0.0054 89.17 +0.33−0.42

Web links

Commons : Kepler-33  - collection of pictures, videos and audio files

Individual evidence

  1. ↑ a b c SIMBAD: Kepler-33. Retrieved July 27, 2015 .
  2. ↑ a b c d e f g h i j k l NASA Exoplanet Archive: Kepler-33. Retrieved July 26, 2015 .
  3. ↑ a b c Lissauer, JJ; Marcy, GW; Rowe, JF; Bryson, ST; Adams, ER et al .: Almost All of Kepler's Multiple Planet Candidates are Planets . arxiv : 1201.5424 .