Last word on ISON...

Only a dim "ghost of ISON" survived the comet's November 28th passage around the Sun. The comet's head dwindled away as it raced through the Sun's greatest heat, but a headless streak emerged into spacecraft view out from the other side of the encounter. It's traveling along the comet's originally prescribed track but fading steadily, with no sign of cometary activity. Nothing will be visible by eye from Earth. The comet's nucleus apparently disrupted near perihelion, with the comet's head fading from perhaps a peak brightness of visual mag –2 some hours before perihelion to well below mag +1 before perihelion.