HD 189733 b

HD 189733 b is a hot Jupiter about 65 light-years' distant, orbiting a K-type star (i.e., orange dwarf, HD 189733 A), which is the larger star of a binary system, the other star, a red dwarf (HD 189733 B). The planet was discovered in 2005 by the radial velocity method with the ELODIE spectrograph on the OHP 1.93 m telescope, with transits discovered soon afterward. Planet characteristics:

• Host star: HD 189733 A.
• Discovery: by the radial velocity method in 2005.
• Vulpecula - constellation.
• 20h00m43.71294s - right ascension.
• +22deg42m39.0732s - declination
• 64.5 ly - distance.
• 0.03 AU - orbital radius (semi-major axis).
• 2.2 days - orbital period.
• 1.1 - radius in Jupiter radii.
• 1.123 - Jupiter masses.
• 1192 K - brightness temperature.