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.[3]
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.[6][7]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 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 |
References
- ^ Roman, Nancy G. (1987). “Identification of a constellation from a position”. Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP…99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
- ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). “Gaia Data Release 3. Summary of the content and survey properties”. Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A…674A…1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d e f g h i “SIMBAD query result: HD 197286 — Star”. Centre de Données astronomiques de Strasbourg. Retrieved 2009-05-06.
- ^ a b 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.
- ^ Wallack, Nicole L.; Knutson, Heather A.; Deming, Drake (2021), “Trends in Spitzer Secondary Eclipses”, The Astronomical Journal, 162 (1): 36, arXiv:2103.15833, Bibcode:2021AJ….162…36W, doi:10.3847/1538-3881/abdbb2, S2CID 232417602
- ^ 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.
- ^ 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.
External links
- “WASP-7”. Exoplanets. Archived from the original on 2016-03-03. Retrieved 2009-05-06.
