Kepler-56

Kepler-56

Graphical sketch of the Kepler-56 system. The line of sight from Earth is illustrated by the dashed line, and dotted lines show the orbits of three detected companions in the system. The solid arrow marks the rotation axis of the host star, and the thin solid line marks the host star equator.
Credit: NASA GSFC/Ames/D Huber
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 19h 35m 02s
Declination +41° 52′ 19″
Apparent magnitude (V) 13
Characteristics
Spectral type G0V
Astrometry
Proper motion (μ) RA: 19:35:02 mas/yr
Dec.: +41:52:19 mas/yr
Details
Mass1.37 M☉
Radius4.23 R☉
Temperature4931 K
Other designations
Kepler-56
Database references
SIMBADdata
Extrasolar Planets
Encyclopaedia		data

Kepler-56 is a star roughly 2,800 light years away[1] with slightly more mass than the Sun. It has two confirmed planets, one slightly smaller than Neptune, and another slightly smaller than Saturn. Both planets were discovered in 2012.

Planetary system

In 2012, a planetary system was discovered around Kepler-56 via transit method. Planets were subsequently confirmed through transit timing variation method.

Asteroseismological studies revealed that the orbits of Kepler-56b and Kepler-56c are about 45° misaligned to the host star's equator. Follow-up radial velocity measurements revealed the evidence of a gravitational perturbator but currently it is not clear if it is a nearby star or a third planet.[2]

Both Kepler-56b and Kepler-56c will be devoured by their parent star in 130 and 155 million years, respectively.[3][4]

The Kepler-56 planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 0.07 MJ 0.1028 10.5034294 — 79.640° 3.606495320 R⊕
c 0.569 MJ 0.1652 21.4050484 — 81.930° 7.844702558 R⊕
d 3.3 MJ 2 — 0.4 — —

References

  1. ↑ "Chow Down! Star Will Devour 2 Alien Planets". Space.com. 10 June 2014. Retrieved 11 June 2014.
  2. ↑ Daniel Huber; et al. (2013-10-21). "Stellar Spin-Orbit Misalignment in a Multiplanet System". Cornell University Library. Archived from the original on 2013-10-21. Retrieved 2013-10-24.
  3. ↑ "Chow Down! Star Will Devour 2 Alien Planets". Space.com. 10 June 2014. Retrieved 11 June 2014.
  4. ↑ Gongjie Li; et al. (2014-08-25). "The Dynamics of the Multi-planet System Orbiting Kepler-56". Cornell University Library. Archived from the original on 2014-08-25. Retrieved 2014-08-27.

External links

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