Re: (IAAC) Obj: Jonkherre 900 (PK 194+2.1) - Inst: 51cm f/10 classical Cassegrain
Lew, thanks for getting the IAAC up and working again so
quickly, I appreciate your efforts and your skills.
I have observed J 900 once with the 13" f/5.6 while at
a rural site on a night I rated 8/10 for seeing and contrast.
J 900 Pretty bright, very small, somewhat elongated, grey-green in
color. This object can be found at 100X and going to 285X with
averted vision makes it grow. From R. Jonckheere PN catalog early in
this century. (pretty soon I will have to amend that statement)
Clear Skies to all;