Kepler-1647b
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Kepler-1647b (sometimes named Kepler-1647(AB)-b to distinguish it from the secondary component; also known by its Kepler Object of Interest designation KOI-2939.01) is a circumbinary exoplanet that orbits the binary star system Kepler-1647, 3,700 light-years (1,100 pc) from Earth in the constellation Cygnus.[1] It was announced on June 13, 2016 in San Diego at a meeting of the American Astronomical Society.[1] It was detected using the transit method, when it caused the dimming of the primary star, and then again of the secondary star blended with the primary star eclipse.[2] The first transit of the planet was identified in 2012, but at the time the single event was not enough to rule out contamination, or confirm it as a planet.[2] It was discovered by the analysis of the Kepler light-curve, which showed the planet in transit.
Characteristics
Mass and orbit
The exoplanet is a gas giant, similar in size to Jupiter, and has an orbit period that's 1107 days.[2] This makes it the longest transit period of any confirmed transiting exoplanet discovered yet.[1] It is also the largest circumbinary planet.[2] It is 483±206 the Earth's mass, and 1.52±0.65 Jupiter's mass.[3]
Host stars
The star system, Kepler-1647 (also known as 2MASS J19523602+4039222, KOI-2939 and KIC 5473556), is a binary star with the primary star (Kepler-1647 A) having a mass of 1.22 M☉, a radius of 1.79 R☉, and a surface temperature of 6210 ± 100 K. In comparison, the Sun has a surface temperature of 5778 K.[4] The binary star system's age is estimated to be about 4.4 billion years old, about 200 million years younger then the Sun. which is 4.6 billion years old. The mass, radius, and temperature of the secondary star (Kepler-1647 B), is not known.
The star's apparent magnitude, or how bright it appears from Earth's perspective, is unknown.
Habitability
The planet is in the habitable zone of the star system.[1][2] Since the planet is a gas giant, it is unlikely to host life. However, possibilities of large enough moons could potentially be suitable for life.[1][2] The moon would likely have to be at least the size of Mars to be able to to support habitability,[citation needed] however large moons like this aren't usually created during accretion near a gas giant. It would likely have to be captured separately.
See also
References
- ^ a b c d e "New Planet Is Largest Discovered That Orbits Two Suns". NASA. June 13, 2016. Retrieved June 14, 2016.
- ^ a b c d e f Veselin B. Kostov, Jerome A. Orosz, William F. Welsh, Laurance R. Doyle, Daniel C. Fabrycky, Nader Haghighipour, Billy Quarles, Donald R. Short, William D. Cochran, Michael Endl, Eric B. Ford, Joao Gregorio, Tobias C. Hinse, Howard Isaacson, Jon M. Jenkins, Eric L. N. Jensen, Stephen Kane, Ilya Kull, David W. Latham, Jack J. Lissauer, Geoffrey W. Marcy, Tsevi Mazeh, Tobias W. A. Muller, Joshua Pepper, Samuel N. Quinn, Darin Ragozzine, Avi Shporer, Jason H. Steffen, Guillermo Torres, Gur Windmiller, William J. Borucki. "Kepler-1647b: the largest and longest-period Kepler transiting circumbinary planet" (PDF). arXiv:1512.00189v2.
{{cite journal}}: Cite journal requires|journal=(help)CS1 maint: multiple names: authors list (link) - ^ "Kepler-1647b - NASA Exoplanet Archive". Retrieved June 14, 2016.
- ^ Fraser Cain (15 September 2008). "Temperature of the Sun". Universe Today. Retrieved 19 February 2011.
External links
Kepler-1647b - NASA Exoplanet Archive
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