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Graham Bell
Northeast Kansas Amateur Astronomers’
League
(comet co-discoverer)
Abstract:
Graham Bell was educated at the University of Wyoming, where he majored in
physics. He has also received graduate credits in mathematics and
operations research from Florida State University and Colorado State
University. He has been a life-long amateur astronomer, if reading with
only occasional viewing qualifies one as an amateur astronomer. In 1997
he became a frequent observer when he received an 8-inch SCT as a
birthday present. He has, since that time, become involved heavily in
minor planet research, where his efforts have been devoted to improving
orbital elements for Near-Earth asteroids and the discovery of a number
of main belt asteroids. In 2000, he received the Edgar Wilson award for
him shared discovery of comet P/1999X1 (Hug-Bell). Graham has given
numerous talks on minor planets, and has been an organizer and regular
participant in the annual international Minor Planet Amateur/Profesional
Workshop. Graham Bell's research web page is
http://gebell.home.mindspring.com/
Graham E. Bell is deeply involved in Minor Planet Research through his
association with NEKAAL, the Northeast Kansas Amateur Astronomers League. NEKAAL
is the local astronomy club in Topeka, and several of its members, working with
computer, telescopes and CCD cameras out of their Far Point Observatory, are
involved in recovering the orbital data of asteroids, as well as working to
discover new comets and asteroids. Asteroid research is often neglected by
professional astronomers, who are working in bigger projects, and is thus one of
the major opportunities for amateur astronomers to get directly involved in
astronomical research.
Minor planets fall into two categories, asteroids and comets. These
objects are essentially small bits of loose debris orbiting around in the Solar
system.
Minor planets are classified into three categories:
- Near Earth Objects, or asteroids whose orbit can
take them inside the orbit of the Earth,
- Main Belt Objects, or asteroids whose orbit is in
the main belt of asteroids between Mars and Jupiter, and
- Trans Neptunian Objects, or asteroids whose orbits
is in the outer solar system past Neptune.
While still in outer space, these objects are called asteroids, or, in come
cases, meteoroids. If an asteroid enters the Earth’s atmosphere, it is then
called a meteor, and is detectable as it burns up during its fall. If one of
these meteors is big enough to make it through the atmosphere without burning
up completely, and actually hits the surface, it is then called a meteorite.
The main purposes of Minor Planet research is to find out how many comets
asteroids and meteoroids there are, what is their origin and composition, and
especially to find objectsthat might ever hit Earth.
During an observation of a specific object, the
observer will attempt to determine its specific orbital data, and record its
luminosity and light curve. Often, amateur astronomers doing Minor Planet
Research will recover an asteroid that that been lost, or discover an entirely
new object.
Most minor planets, being small objects, are very
faint. Minor Planet observers use several techniques in their work. Both CCD and
film is used to make images of asteroids. A CCD camera is more sensitive and can
bring out fainter objects, but regular film is still useful. Once images are
made, they are used to detect movement against the stellar background. This is
done by comparing two or more images of the same are at different times, and
seeing if any of the "dots" have moved. If motion is detected, then it is
possible to measure the position of the minor planet at the moment the image was
taken. A photometer is used to measure magnitudes.
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