Scientific Colloquium
October 18, 2013
MATTHEW
KNIGHT
LOWELL OBSERVATORY
"What's the Big Deal about Comet ISON?"
Comet ISON (C/2012 S1) has
gained considerable notoriety due to predictions of its becoming
very bright in late November 2013 when it passes less than 2
solar radii from the Sun’s photosphere. Comet ISON is the only
known “sungrazing” comet that is also reaching the inner solar
system from the Oort Cloud for the first time. Thus, it presents
an unique opportunity to study a comet from the icy recesses of
the outer solar system to the extreme heat near the Sun and, if
it survives, back out again. An extensive observing campaign to
study Comet ISON is underway that includes multi-wavelength
observations from traditional ground- and space-based
telescopes, solar observatories, and a number of NASA assets
throughout the inner solar system. In this talk I will discuss
the current state of knowledge about Comet ISON and use the
behaviors of past sungrazing comets to predict what will likely
happen as Comet ISON reaches perihelion.
About the speaker:
Matthew Knight is an assistant research scientist at Lowell
Observatory in Flagstaff, AZ. He studies the nucleus and coma
properties of comets in order to better understand how the solar
system formed and evolved. He has more than 150 nights of
experience observing comets at optical and infrared wavelengths
and has studied more than 1000 comets observed by the SOHO and
STEREO spacecraft. He received his Ph.D. from the University of
Maryland in 2008 where he studied sungrazing comets. He is a
member of NASA’s Comet ISON Observing Campaign committee where
he is involved in encouraging and facilitating worldwide
observations of Comet ISON.