WASP-8b
| Exoplanet | List of exoplanets | |
|---|---|---|
| 300px |
||
| Parent star | ||
| Star | WASP-8 | |
| Constellation | Sculptor | |
| Right ascension | (α) | 23h 59m 36.07s |
| Declination | (δ) | −35° 01′ 52.9″ |
| Apparent magnitude | (mV) | 9.9 |
| Distance | 160 ly (49 pc) |
|
| Spectral type | G6 | |
| Mass | (m) | 1.00+0.02 −0.03 M☉ |
| Orbital elements | ||
| Semi-major axis | (a) | 0.0793 AU |
| Orbital period | (P) | 8.16 d |
| Physical characteristics | ||
| Mass | (m) | 2.23 MJ |
| Radius | (r) | 1.17 RJ |
| Density | (ρ) | 1.85[1] g cm−3 |
| Surface gravity | (g) | 4.30 g |
| Temperature | (T) | 950 (varies)[2] |
| Discovery information | ||
| Discovery date | April 1, 2008 | |
| Discoverer(s) | Cameron et al. (SuperWASP) | |
| Discovery method | Transit | |
| Discovery status | Confirmed | |
WASP-8b is an extrasolar planet discovered (with their stars) in the SuperWASP batch -6b to -15b. On 1 April 2008, Dr. Don Pollacco of Queen’s University Belfast announced them at the RAS National Astronomy Meeting (NAM 2008).[3]
At 49 parsecs away, this system is the closest of the WASP-discovered systems: closer to Earth than are HD 17156 and HD 149026. It is denser than Jupiter. If it were possible to stand on its surface, one would experience a gravitational pull of approximately 4 1⁄3g, resulting in difficulty breathing and eventual brain damage.
The planet orbits retrograde.[4][5]
The equilibrium temperature is 950 K, but this oscillates due to eccentricity.[2]
See also
References
- ↑ Density is calculated from the mass and the radius, assuming a circular disc of eclipse relative to the Earth.
- ↑ 2.0 2.1 Patricio Cubillos et al., "The Characterization of the Cool and Eccentric Exoplanet WASP-8b with Spitzer" in DPS Annual Meeting session "103.Extrasolar Planets: Atmospheric Chemistry and Characterization" (Monday, Oct 15, 2012, 11:40 AM -11:50 AM).
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External links
Media related to Lua error in package.lua at line 80: module 'strict' not found. at Wikimedia Commons
