According to online reports, Comet ISON may have brightened considerably over the last two days. If true, ISON is now at the cusp of naked-eye visibility.
Like superheroes scanning over police frequencies, we at ISONblog keep our ears to the ground for signs of new ISON activity. In an "ISON Alert" email this morning, the University of Maryland's Mike Kelley shared this breaking news:
"There are several reports of a dramatic increase in comet ISON's
brightness this morning. Total magnitude estimates, reported to the
Yahoo Comets Mailing List, are around 6.5 to 6.0.
Emmanuel Jehin (TRAPPIST) reports a factor of 8 increase in OH and
Afrho (dust) in the last 24 hours. He also reports that there is not
yet an indication of disruption.
A nice set of images by Juanjo Gonzalez can be found at
http://cieloprofundo.files.wordpress.com . Note the bottom two images
are taken the 12th and 14th of November.
Observations are clearly need [sic] to determine how long this trend
persists, if any fragments appear, or [if] the nucleus disintegrates."
Sky and Telescope is also on the story, with confirmation of the brightness increase from comet observer John Bortle. We'll update you once we hear more.