Thursday, June 02, 2016

viewed Mars and Jupiter (Blue Mountains)

Viewed Jupiter in Ian's 12½" Dob. Only 3 moons. Great Red Spot front and centre. At times, a stunning view.

Later, I turned to Mars. Odd. Took a while to tag it. Had to re-centre the finder scope. Thought I had seen Ian adjust it earlier... The planet looked horrible. And it was not just the elevation. The collimation had gone off! Way off. Weird.

10:30 PM. Let Ian know. He was perturbed but concurred that the primary mirror had moved. He adjusted the sling and got it sorted. Yeh!


Looked up Jupiter in SkyTools so to find the missing moon. Io, on its own to the west; Ganymede and Callisto on the other side.

Oh ho! Europa was in eclipse. It would pop into view on the east side after 11:15 PM...


11:35 PM. Slewed the Celestron 14" to Jupiter. Dang. Europa was already out from the eclipse. I missed it emerging. It knew it was some time between 11:15 and 11:30...

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