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Exoplanet List of exoplanets
Exoplanet Comparison WASP-28 b.png
Size comparison of WASP-28b with Jupiter.
Parent star
Star WASP-28
Constellation Pisces[1]
Right ascension (α) 23h 34m 27.87s[2]
Declination (δ) +01° 34′ 48.2″[2]
Apparent magnitude (mV) 12.03[2]
Distance 1336.6 ± 228.2 ly
(410 ± 70[2] pc)
Spectral type F8[2]
Mass (m) 1.08 ± 0.04[2] M
Radius (r) 1.05 ± 0.06[2] R
Temperature (T) 6100 ± 150[2] K
Metallicity [Fe/H] −0.29 ± 0.10[2]
Age 5+3
[2] Gyr
Orbital elements
Semi-major axis (a) 0.0442±0.0010[3] AU
Eccentricity (e) <0.075[3]
Orbital period (P) 3.40883495±0.00000015[3] d
Inclination (i) 88.61 ± 0.67[2]°
Time of transit (Tt) 2455290.40519 ± 0.00031[2] JD
Physical characteristics
Mass (m) 0.91 ± 0.06[2] MJ
Radius (r) 1.12 ± 0.06[2] RJ
Temperature (T) 1468 ± 37[2] K
Discovery information
Discovery date 2010
Discoverer(s) SuperWASP
Discovery method Transit
Discovery status Published[2]
Database references
Extrasolar Planets
Exoplanet Archive data
Open Exoplanet Catalogue data

WASP-28b is an extrasolar planet discovered 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][2] Since it orbits its star very closely, the planet is a strongly irradiated hot Jupiter.[2] As seen from the Earth, WASP-28b transits its host star every 3.41 days taking about 3 hours to do so.[2]

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.[3]

Internal structure[edit]

The planet seems to be a gas giant with a low core mass (<~10M(Earth)) and a low heavy elements content (Z<~0.2).[2]


  1. ^ Roman, Nancy G. (1987). "Identification of a Constellation From a Position". Publications of the Astronomical Society of the Pacific. 99 (617): 695–699. Bibcode:1987PASP...99..695R. doi:10.1086/132034.  Vizier query form
  2. ^ a b c d e f g h i j k l m n o p q r s t 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:1402.1482Freely accessible. Bibcode:2015A&A...575A..61A. doi:10.1051/0004-6361/201423591. 
  3. ^ a b c d Močnik, T.; Hellier, C.; Anderson, D. R. (2017). "K2 Looks Towards WASP-28 and WASP-151". arXiv:1710.08892Freely accessible [astro-ph.EP]. 
  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:1402.5163Freely accessible. Bibcode:2014PASP..126..398H. doi:10.1086/676406. 

External links[edit]