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Table of Contents | Enchanted Learning All About Astronomy |
Site Index |
Our Solar System | Stars | Glossary | Printables, Worksheets, and Activities | ||||||
The Sun | The Planets | The Moon | Asteroids | Kuiper Belt | Comets | Meteors | Astronomers |
Comets |
Introduction to Comets | Crossing a Comet's Orbit: Meteor Showers | Comet Origins | Major Comets | Acitvities, Web Links |
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An SL-9 impact site on Jupiter, July 6, 1994. Photo by Hubble Space Telescope. |
HALE-BOPP COMET
Hale Bopp (designated C/1995 O1) is a periodic comet that orbits around the sun. Its earliest-recorded sighting was on July 23, 1995. It was independently discovered by Alan Hale (of New Mexico) and Thomas Bopp (of Arizona), both amateur astronomers. This comet has a diameter of about 40 km; it's rotation rate is 11.4 hours. It was last seen in 1997 and will be seen next in the year 4377; its period is 2380 years.
SOME COMETS
About 600 comets have been observed. About a dozen comets are discovered each year. Most comets have very long periods (over 200 years).
A Few Comets
Discovered
Last Visit
Next Visit
Period
(years)
Biela
1772
1852
broken up
6.62
Encke
1786
1997
2000
3.28
Faye
1843
1991
1999
7.34
Hale-Bopp
July 23, 1995
1997
4377
2380
Halley
240 B.C.
1986
2061
76.00
Hyakutake
January 30, 1996
1996
31,496
29,500
Kohoutek
March 7, 1973
1973
76,973
75,000
Swift-Tuttle aka Kegler (responsible for the Perseids meteor shower)
July 16, 1862
(Kegler first seen in 1737)1992
2126
about 130
Wild 2/Comet 81P
January 6, 1978
(by Paul Wild)-
-
6.39 years
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