HD 189733 b
A deep-blue hot Jupiter where it may rain molten glass.
HD 189733 b is a hot Jupiter about 64.5 light-years away in Vulpecula. Astronomers in France discovered it in October 2005 by watching it transit its star. It is about 11% more massive and 11% larger than Jupiter and orbits its star every 2.2 days.
As the closest transiting hot Jupiter to Earth it has been studied in detail: it was the first exoplanet to have a thermal map made and its overall colour measured (deep blue), and its weather is thought to include rain of molten glass. Carbon dioxide has been confirmed in its atmosphere.
Quick Facts
- Discoverer
- Bouchy et al.
- Discovery site
- Haute-Provence Observatory
- Discovered
- October 5, 2005
- Discovery method
- Doppler spectroscopy; Transit
- Star
- HD 189733
- Albedo
- 0.40, 0.12 (290–450 nm), 0.076, 0.016 (geometric)
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