Astronomy:WASP-7b
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Short description: Extrasolar planet in the constellation Microscopium
 Size comparison of WASP-7b with Jupiter. | |
| Discovery | |
|---|---|
| Discovered by | Cameron et al. (SuperWASP) |
| Discovery site | SAAO |
| Discovery date | April 1, 2008 |
| Transit | |
| Orbital characteristics | |
| 0.0618+0.0014−0.0033 AU | |
| Eccentricity | 0.0173+0.0009−0.0011[1] |
| Orbital period | 4.954658+5.5e-5−4.3e-5 d |
| Inclination | 89.6+0.4−0.9 |
| Star | WASP-7 |
| Physical characteristics | |
| Mean radius | 0.915+0.046−0.04 |♃|J}}}}}} |
| Mass | 0.96+0.12−0.18 |♃|J}}}}}} |
| Mean density | 1,660 kg/m3 (2,800 lb/cu yd) |
| 3.03 g | |
| Physics | 1393+80−82 K[1] |
WASP-7b is an extrasolar planet discovered in 2008. This 5-day period planet is slightly smaller than Jupiter, roughly the same mass and more dense.[2]
A study in 2012, utilizing the Rossiter–McLaughlin effect, determined the planetary orbit is strongly misaligned with the equatorial plane of the star, with misalignment equal to 86±8°, making the planetary orbit nearly polar.[3] The orbit is also slightly eccentric, which is surprising given the tidal circularization timescale of below 650 million years.[1]
Physical properties
The measured temperature on the planetary dayside is 1393+80−82 K.[1] Sodium was detected in the planetary atmosphere in 2022.[4]
See also
- SuperWASP
References
- ↑ 1.0 1.1 1.2 1.3 Wallack, Nicole L.; Knutson, Heather A.; Deming, Drake (2021), "Trends in Spitzer Secondary Eclipses", The Astronomical Journal 162 (1): 36, doi:10.3847/1538-3881/abdbb2, Bibcode: 2021AJ....162...36W
- ↑ Hellier et al. (December 11, 2008). "WASP-7: The brightest transiting-exoplanet system in the Southern hemisphere". The Astrophysical Journal Letters 690 (1): L89–L91. doi:10.1088/0004-637X/690/1/L89. Bibcode: 2009ApJ...690L..89H.
- ↑ Albrecht, Simon; Winn, Joshua N.; Johnson, John A.; Howard, Andrew W.; Marcy, Geoffrey W.; Butler, R. Paul; Arriagada, Pamela; Crane, Jeffrey D. et al. (2012), "Obliquities of Hot Jupiter Host Stars: Evidence for Tidal Interactions and Primordial Misalignments", The Astrophysical Journal 757 (1): 18, doi:10.1088/0004-637X/757/1/18, Bibcode: 2012ApJ...757...18A
- ↑ Rahmati, Hossein; Czesla, Stefan; Khalafinejad, Sara; Mollière, Paul (2022), "Transmission spectroscopy of WASP-7 b with UVES", Astronomy & Astrophysics 668: A24, doi:10.1051/0004-6361/202243955
External links
Coordinates: 
20h 44m 10s, −39° 13′ 31″
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