Discovered
Appeared
Not observed
Appeared before discovery
Not observed before discovery
Returns in the future
2061 Dec. 4
C/1917 F1
1917 Apr. 11
The perihelion dates in the past appearances are printed on Catalog of Cometary Orbits 1996.
The perihelion date in the next return is calculated by Kazuo Kinoshita (http://www9.ocn.ne.jp/~comet/pcmt/j17f1.htm).
Copyright(C) Seiichi Yoshida (comet@aerith.net). All rights reserved.