WASP-8b
Exoplanet | List of exoplanets | |
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Parent star | ||
Star | WASP-8 | |
Constellation | Sculptor | |
Right ascension | (α) | 23h 59m 36.0711s[1] |
Declination | (δ) | −35° 01′ 52.920″[1] |
Apparent magnitude | (mV) | 9.9 |
Distance | ±7 291[1] ly (±2 89[1] 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[2] g cm−3 |
Surface gravity | (g) | 4.30 g |
Temperature | (T) | 950 (varies)[3] |
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).[4]
This system is located 89 parsecs away, which is closer than most Hot Jupiters. It is denser than Jupiter.
The planet orbits retrograde.[5][6]
The equilibrium temperature is 950 K, but this oscillates due to eccentricity.[3]
See also
References
- 1 2 3 4 Brown, A. G. A; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512. Gaia Data Release 1 catalog entry
- ↑ Density is calculated from the mass and the radius, assuming a circular disc of eclipse relative to the Earth.
- 1 2 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).
- ↑ "THE (SUPER)WASP FACTORY FINDS 10 NEW PLANETS IN THE LAST 6 MONTHS". 2008. Retrieved 2009-05-13.
- ↑ European Southern Observatory. "Artist's impression of an exoplanet WASP 8b in a retrograde orbit".
- ↑ Didier Queloz; et al. (2010). "WASP-8b: a retrograde transiting planet in a multiple system". Astronomy and Astrophysics. 517: L1. arXiv:1006.5089. Bibcode:2010A&A...517L...1Q. doi:10.1051/0004-6361/201014768.
External links
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