WASP-28b

WASP-28b is an extrasolar planet discovered in 2010[3] by the Wide Angle Search for Planets (WASP) project orbiting WASP-28, a magnitude 12 star also known as 1SWASP J233427.87-013448.1 and 2MASS J23342787-0134482.[4][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]

WASP-28b
Size comparison of WASP-28b with Jupiter.
Discovery[1]
Discovered bySuperWASP
Discovery date2010
Transit
Orbital characteristics
0.0442±0.0010 AU
Eccentricity<0.075[2]
3.40883495±0.00000015[2] d
Inclination88.61 ± 0.67[1]
StarWASP-28
Physical characteristics
Mean radius
1.12 ± 0.06[1] RJ
Mass0.91 ± 0.06[1] MJ
Temperature1468 ± 37[1] K

    The planet was observed by the Kepler spacecraft during the K2 mission engineering campaign in February 2014 as part of an early science demonstration.[5] It was also observed from December 2016 to March 2017 during K2's campaign 12 which allowed a refinement of the system parameters.[2]

    Internal structure

    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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    References
    1. Anderson, D. R.; et al. (2015). "WASP-20b and WASP-28b: A hot Saturn and a hot Jupiter in near-aligned orbits around solar-type stars". Astronomy and Astrophysics. 575. A61. arXiv:1402.1482. Bibcode:2015A&A...575A..61A. doi:10.1051/0004-6361/201423591.
    2. Močnik, T.; Hellier, C.; Anderson, D. R. (2020). "K2 Looks Toward WASP-28 and WASP-151". Publications of the Astronomical Society of the Pacific. 132 (1007). 014401. arXiv:1710.08892. Bibcode:2020PASP..132a4401M. doi:10.1088/1538-3873/ab5598.
    3. internet archive - WASP-28b: a hot Jupiter transiting a low-metallicity star
    4. "WASP-28". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved December 20, 2017.
    5. Howell, Steve B.; et al. (2014). "The K2 Mission: Characterization and Early Results". Publications of the Astronomical Society of the Pacific. 126 (938): 398–408. arXiv:1402.5163. Bibcode:2014PASP..126..398H. doi:10.1086/676406.
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