Cerpican allegedly is the name of an inhabited planet circling a star in the Canis Major constellation, of which Sirius is the main star. It is said to be the home planet of Xenon, one of the extraterrestrial guides that the Mission Rahma contactees are in touch with.

Both Xenon and Cerpican were first mentioned in Sixto Paz Wells' book 'The Invitation.'

Sources: cosmicsundance.com/index.php/13-rama-mission-mision-rama and www.exopoliticsjournal.com/vol-4/vol-4-1-Piacenza.htm.