Comet 67P Confirmed To Be a Contact Binary

Comet 67P/C-G imaged by NavCam on July 7, 2015 (ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0)
Comet 67P/C-G imaged by NavCam on July 7, 2015 (ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0)

Ever since we got our first good look at Comet 67P/Churyumov-Gerasimenko from the approaching Rosetta spacecraft in 2014 it has been considered to be a textbook example of a contact binary, with its “rubber duckie” double-lobed shape consisting of an oval “head” and flat-bottomed “body” joined by a “neck.’ Now, using data gathered by Rosetta’s OSIRIS instrument while in permanent orbit, scientists are certain that this is indeed the case: 67P/C-G as we see it today was created by the slow-speed collision of two separate comets, each once an independent and fully-formed object in its own right (and not, as the alternate hypothesis suggested, via the gradual erosion of a once-larger single object.)

Read more about these findings and how they were determined on ESA’s Rosetta site here.

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One Comment

  1. Jörg Kruth says:

    …interesting new facts. This collision really had to be slow, not to destroy the two objects to much, I think, would be fine if we could reconstruct this collision somehow.

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