COBS Statistics page for Harold B. Ridley (BAA, United Kingdom) in October 1970

Total
Number of observed comets:
(total is number of comets in COBS database)		 2 of 2618
Total number of observations: 6
Visual Observations: 6
CCD Observations: 0
Comet type Total Visual CCD
October 1970 Total Visual CCD Obs
Comet Total Visual CCD Obs
Association Total Visual CCD Obs
Country Total Visual CCD Obs