Canopus56 wrote:
From the 2005 RASC Observer's Guide for 20050610 -
02:54 UTC Europa moves in front of Jupiter disk 04:18 UTC Io moves in front of Jupiter disk 05:20 UTC Europa shadow moves over Jupiter disk 05:29 UTC Io shadow moves over Jupiter disk 05:35 UTC Europa moves off of Jupiter disk 06:29 UTC Io moves off Jupiter disk 07:39 UTC Io shadow leaves Jupiter disk 07:59 UTC Europa shadow leaves Jupiter disk
Using the Big Scope at SPOC several of us watched as Io passed in front of Jupiter and then promptly vanished. Worked on the Big Scope's pointing accuracy for a while and then watched as Europa's and Io's shadows moved onto the Jovian disk in quick succession. Very easy to see the shadows. Like two ink dots. Then watched Europa egress the disk. That done we switched to M-51. Easy to see the spiral structure. M-27 filled the field. M-57 bared its central star with averted vision at 200x. 400x made it even easier. We are SLAS members, after all, so after all of that it's time for ATS at the Flying J. Patrick