Reports from Geisei Observatory <September 13, 2007>
Reminiscence of Comet Crommelin and past data
Comet Crommelin was an unforgettable comet. It was the first
comet I independently discovered as a comet hunter in 1956 . I remember
I pedaled furiously along the streets to the telegraph office through the
chilly autumn air at dawn.
I discovered this comet at 4 am near the radiant of the Leonid
Meteor shower. It was at 10th magnitude. When 28 years had passed and the
comet returned, I greeted it with Geisei's 60cm reflector.
The following are unpublished results of my observations
of the comet:
1984UT R.A.i2000.0jDecl. m1
Feb.20.42861 01 04 39.48 +00 23 00.6 9.0 372
29.42326 01 55 40.33 -03 07 14.7 372
29.42743 01 55 41.86 -03 07 21.7 8.5 372
29.44514 01 55 48.04 -03 07 48.8 372
Mar.26.44063 04 39 15.54 -14 42 36.1 15.0 372
The above results are not necessarily good, because in those
days I was using the SAO catalog which included only a limited number of
stars. I remeasured the images of the comet. In about 4 years the comet
will return for the third time. I am curious how it will appear and how
bright it will become on its return.
The results of these old observations haven't been sent to
MPC, but I hope they are of some use to Japanese observers who do orbit
calculations. I will continue to work on the past images, which haven't
been measured yet.