Swift-Tuttle, Comet 109P/
A short-period comet and the parent body
of the Perseids meteor shower. It was discovered
on July 16, 1862, by Lewis Swift (from Marathon, New York), and, independently,
on July 19, 1862, by Horace Parnell Tuttle (from Harvard University); however,
it is now known to be the same as Comet Kegler of 1737 and appearances have
been identified as far back as 69 BC. Last seen in
1992, Swift-Tuttle will be in our vicinity again in 2126.