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Exoplanetary Scratchpad

[SysBP Img]

Star system containing a planet discovered by dopplar spectrometry method and later found by amateurs to transit. At the time, it smashed the records for the furthest transiting planet (period of 21 d, 0.0523 to 0.26 AU) and most eccentric orbit. Its orbit was found to be well aligned with the rotation of its star. Its size has been measured better with the Hubble Telescope (3.8 MJ). A second, unconfirmed planet has also been proposed for this system.

HD 17156 System Web Pages[]

HD 17156 System In the News[]

Planet Discovered (Apr 2007)[]

Transit Detected by Amateurs (Oct 2007)[]

2nd Planet Proposed (Feb 2008)[]

Orbit Well Aligned with Star Rotation (2009)[]

Planet Larger Than Thought, More "Normal" (2010)[]

See Also[]