Discovered
Appeared
Not observed
Appeared before discovery
Not observed before discovery
Returns in the future
2059 June 8
23P/1989 N1
1989 Sept.11
23P/1919 Q1
1919 Oct. 17
23P/1847 O1
1847 Sept.10
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/pcmtn/0023p.htm).
Copyright(C) Seiichi Yoshida (comet@aerith.net). All rights reserved.