64P/Swift-Gehrels is a periodic comet in the solar system which has a current orbital period of 9.23 years.
It was originally discovered on 17 November 1889 by Lewis A. Swift at the Warner Observatory, Rochester, New York, and was described by Swift as being pretty faint.
It was rediscovered on 8 February 1973 by Tom Gehrelsat the Palomar Observatory, California who estimated its brightness as a very low magnitude 19.
It was also observed in 1981, 1991, 2000, 2009 and 2018.
you can see in the photo below I was fortunate to capture
Swift-Gehrels passing by the Great Andromeda Galaxy on the night of
November 4th, 2018,
64/P Swift-Gehrels, December 3rd, 2018 at 00:58 AM EST. 31 x 30 second
subs shot @ 3200 ISO @ my Observatory in Statesville, NC.
Swift Gehrels video file