HD 187123 b

HD 187123 b is a typical "hot Jupiter" located approximately 150 light-years away in the constellation of Cygnus, orbiting the star HD 187123. It has a mass about half that of Jupiter and it orbits in a very tight, round orbit around the star every three days.

HD 187123 b
Discovery
Discovered byButler, Marcy,
Vogt, Apps et al.
Discovery siteCalifornia, United States
Discovery date9 September 1998
radial velocity
Orbital characteristics
0.04213±0.00034 AU
Eccentricity0.0093±0.0046
3.0965828±0.0000043 d
2454342.87±0.30
360±200
Semi-amplitude68.91±0.36
StarHD 187123

    The star has also been monitored for possible transits by the planet, but none was found.

    The presence of water has been detected in the atmosphere of HD 187123 b with high confidence.

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