‘So long, farewell, auf Wiedersehen, good buy..’

Comet ISON is now officially gone, well, pretty much. The  NASA Comet ISON Observing Campaign has issued a memoriam for Comet ISON.

Here is the latest view:

 Karl Battams: It may be (almost) gone but comet ISON leaves a legacy of unprecedented data from numerous locations within the solar system! [Image credit: ESA, NASA, Annotations by Karl Battams]

ISON appears as a white smear heading up and away from the sun. ISON was not visible during its closest approach to the sun, so many scientists thought it had disintegrated, but images like this one from the ESA/NASA Solar and Heliospheric Observatory suggest that a small nucleus may be intact.
ISON Fading