WASP-28b

WASP-28b
Exoplanet List of exoplanets

Size comparison of WASP-28b with Jupiter.
Parent star
Star WASP-28
Constellation Pisces[1]
Right ascension (α) 23h 34m 27.8816s[2]
Declination (δ) +01° 34′ 48.113″[2]
Apparent magnitude (mV) 12.03[3]
Distance1150±20[2] ly
(352±6[2] pc)
Spectral type F8[3]
Mass (m) 1.08 ± 0.04[3] M☉
Radius (r) 1.05 ± 0.06[3] R☉
Temperature (T) 6100 ± 150[3] K
Metallicity [Fe/H] −0.29 ± 0.10[3]
Age 5+3
−2[3] Gyr
Orbital elements
Semi-major axis(a) 0.0442±0.0010[4] AU
Eccentricity (e) <0.075[4]
Orbital period(P) 3.40883495±0.00000015[4] d
Inclination (i) 88.61 ± 0.67[3]°
Time of transit (Tt) 2455290.40519 ± 0.00031[3] JD
Physical characteristics
Mass(m)0.91 ± 0.06[3] MJ
Radius(r)1.12 ± 0.06[3] RJ
Temperature (T) 1468 ± 37[3] K
Discovery information
Discovery date 2010
Discoverer(s) SuperWASP
Discovery method Transit
Discovery status Published[3]
Database references
Extrasolar Planets
Encyclopaedia		data
SIMBADdata
Exoplanet Archivedata
Open Exoplanet Cataloguedata

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.[5][3] Since it orbits its star very closely, the planet is a strongly irradiated hot Jupiter.[3] As seen from the Earth, WASP-28b transits its host star every 3.41 days taking about 3 hours to do so.[3]

The planet was observed by the Kepler spacecraft 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.[4]

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).[3]

References

  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. 1 2 3 4 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  3. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 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.
  4. 1 2 3 4 Močnik, T.; Hellier, C.; Anderson, D. R. (2017). "K2 Looks Towards WASP-28 and WASP-151". arXiv:1710.08892 [astro-ph.EP].
  5. ↑ "WASP-28". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved December 20, 2017.
  6. ↑ 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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