Not too sure about "planemos"
Astronomers Discover Twin Planemos
La Silla, Chile (SPX) Aug 04, 2006
The cast of exoplanets has an extraordinary new member. Using the European Southern Observatory's telescopes, astronomers have discovered an approximately seven-Jupiter-mass companion to an object only twice as hefty.
http://www.spacedaily.com/reports/Astronomers_Discover_Twin_Planemos_999.html
