thanks darrell that will be awesome hopefully i will be able to see it well enough without a barlow what do u think im not pushing to much magnification i have 120x with the 15mm i have and 64 with the 28mm and it is not very good at all mabey mark would be up to viewing threw the big guy in his back yard
Post by deepskydarrell on Mar 29, 2016 18:53:00 GMT -8
120X should be fine. 240X if the seeing is really good. These shadows are seeable even in a four inch as tiny fly specks. Ganymede's shadow is the biggest and if seen on the limb looks like a mouse bit a piece out of it. The tricky part is to see the moon itself. Give yourself lots of time and check often in case the moon has moved over an area of higher contrast. Then once you've found the moon you'll notice it's a disc. Then if seeing and optics permit look for detail on the moon!
16.5 inch F 5.3 Zambuto Optics homebuilt Dobsonian
Post by Mark McLaughlin on Mar 30, 2016 13:07:56 GMT -8
I burnt my eye(s) out last night looking at Jupiter. Wow, is it ever nicely placed in the sky. With my 16" the 13 Ethos is 140x and the 8 mm is 228 mag. It nicely fits in the eyepiece. A high haze came over around midnight but after 130 it got transparent enough to get NGC 4510 and a whole chain of fuzzies around mag 12 to 14. After 230 ,it got soft again. With my dog keeping me up most of the day,and being up all night, i am starting to feel like I do at MSQ. But tonight event is worth the stay up and see. Maybe after midnight i might get some sleep.
wow that was very nice thanks for the heads up darrell i missed it right on the edge of the disk i was looking around to see what i could find lol but i went their every 15 mins or so and it was awesome i watched the moon as it came off the disk and u could see the moon and the shadow very nice