after Rob Cardinal, Asteroid
Hunter, University of Calgary
Cardinal was looking for an asteroid, but ended up finding a comet. It is
the first time a comet has been discovered at the University of Calgary's
Rothney Astrophysical Observatory, which is located about 35 kilometres
southwest of Calgary, and only the second Canadian discovery of a comet
using a Canadian telescope in nearly a decade.
Oct. 1, Cardinal thought he saw something move while observing a patch of
sky near the North Celestial Pole while using the observatory's Baker-Nunn
telescope. A subsequent computer analysis of the images taken showed a
moving object that, although faint by visual standards, was actually
exceptionally bright for what was a suspected asteroid at the time.
few more pictures taken about a week later verified that a never-before-seen
member of our solar system had been discovered. It was confirmed by other
observations by astronomers in the U.S. and Japan and the Minor Planet
Center, based at Harvard University, that it was a new comet. As per
protocol, it was named after Cardinal and is officially designated as C/2008
was so excited when I found out," says the astronomer. "It's
satisfying to see your hard work pay off."
Taylor, the head of the Physics and Astronomy department, called the find a
tribute to the team of scientists and the dark sky quality at the
Hildebrand, who holds the Canada Research Chair in Planetary Science, and
his research team at the Rothney have put together the premier wide-field
telescope for space imaging in Canada. The discovery of comet Cardinal is an
exciting achievement," he said.
is not much known yet about the Cardinal comet. U of C scientists are trying
to determine more information about its orbit, whether its passing by Earth
is periodic or whether it will only come by the sun once, which would mean
its orbit is parabolic.
vast majority of the known comets, and the comets now being discovered, are
found near a region of the sky called the ecliptic - that's because their
orbits are similar to the orbits of the planets," says Phil Langill,
the observatory's director.
Cardinal is on a very unusual orbit compared to normal solar system objects
- it's almost 60 degrees out of alignment with all the others. It is
currently near the north star. It was brilliant for Alan and Rob to search
that part of the sky, because everyone else is looking where the likelihood
of asteroid discovery is high."
says the comet is visible right now only in the northern hemisphere until
June and after that it will be visible, and likely brighter, in the southern
says that if you could get hold of cometary material, you would be holding a
4.5 billion year old piece of history, with clues about how things were when
the Sun and the solar system came together. Comet Cardinal is made up of
bits of debris and ice left over when the solar system was created.
adds he credits the local community for remembering to keep their lights off
at night. The observatory has been working with the MD of Foothills to
educate folks about smart lighting choices, light abatement, and what the
astronomers at the U of C's observatory do.
discovery can, in part, be attributable to them," he says.