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WASP-28b or K2-1b is an extrasolar planet discovered in 2010[4] by the Wide Angle Search for Planets (WASP) project orbiting WASP-28, a magnitude 12 star also known as 1SWASP J233427.87-013448.1, 2MASS J23342787-0134482 and K2-1.[5][1] Since it orbits its star very closely, the planet is a strongly irradiated hot Jupiter.[1] As seen from the Earth, WASP-28b transits its host star every 3.41 days taking about 3 hours to do so.[1]
Discovery[1] | |
---|---|
Discovered by | Wide Angle Search for Planets |
Discovery date | 2010 |
Transit | |
Orbital characteristics | |
0.0442±0.0010 AU | |
Eccentricity | <0.075[2] |
3.40883495±0.00000015[2] d | |
Inclination | 88.61 ± 0.67[1] |
Star | WASP-28 |
Physical characteristics | |
1.319+0.028 −0.026[3] RJ | |
Mass | 0.948+0.051 −0.052[3] MJ |
Temperature | 1468 ± 37[1] K |
The planet was observed by the Kepler space telescope during the K2 mission engineering campaign in February 2014 as part of an early science demonstration.[6] It was also observed from December 2016 to March 2017 during K2's campaign 12 which allowed a refinement of the system parameters.[2]
The planet seems to be a gas giant with a low core mass (<~10M(Earth)) and a low heavy elements content (Z<~0.2).[1]
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