18D/Perrine-Mrkos
 

r (AU)	HN	Inbound / Outbound	Mag. code	Date	Reported Mag.	Phase	Observatory code	MPC Number	Observer/Observatory Name
1.41	13.9	O	5	1962/04/05	13.9	29.2	-	-	Roemer
1.30	19.6	O	5	1968/11/23	19.6	19.4	-	-	Roemer