WASP-7, also identified as HD 197286, is a type F star located about 527 light-years away in the constellation Microscopium. This star is a little larger and about 28% more massive than the Sun and is also brighter and hotter. At magnitude 9.5 the star cannot be seen by the naked eye but is visible through a small telescope.
Planetary system
The SuperWASP project announced an extrasolar planet, WASP-7b, orbiting this star in 2008. The planet appears to be another hot Jupiter, a low-density planet with Jupiter's mass orbiting very close to a hot star and thus emitting enough heat to glow.23
The WASP-7 planetary system4| Companion(in order from star) | Mass | Semimajor axis(AU) | Orbital period(days) | Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| WASP-7b | 1.083+0.093−0.088 MJ | 0.06188+0.00098−0.0010 | 4.9546416(35) | <0.049 | 87.03±0.93° | 1.363±0.093 RJ |
See also
External links
- "WASP-7". Exoplanets. Archived from the original on 2016-03-03. Retrieved 2009-05-06.
References
"SIMBAD query result: HD 197286 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-05-06. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=WASP-7 ↩
Hellier, Coel; Anderson, D. R.; Gillon, M.; Lister, T. A.; Maxted, P. F. L.; Queloz, D.; Smalley, B.; Triaud, A. H. M. J.; et al. (2008). "Wasp-7: A Bright Transiting-Exoplanet System in the Southern Hemisphere". The Astrophysical Journal Letters. 690 (1): L89 – L91. arXiv:0805.2600. Bibcode:2009ApJ...690L..89H. doi:10.1088/0004-637X/690/1/L89. S2CID 15962609. /wiki/ArXiv_(identifier) ↩
Southworth, J.; Dominik, M.; et al. (March 2011). "A much lower density for the transiting extrasolar planet WASP-7". Astronomy & Astrophysics. 527: A8. arXiv:1012.5181. Bibcode:2011A&A...527A...8S. doi:10.1051/0004-6361/201016183. /wiki/Astronomy_%26_Astrophysics ↩
Bonomo, A. S.; Desidera, S.; et al. (June 2017). "The GAPS Programme with HARPS-N at TNG. XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets". Astronomy & Astrophysics. 602: A107. arXiv:1704.00373. Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882. /wiki/Astronomy_%26_Astrophysics ↩