A Chance Encounter

 

        Clouds were drifting through the sky as sunset approached. Overhead I could see Vega. I had hopes for an eventual clearing…so I went to take a nap!

        Waking a bit after 11 I went outside to see a nice clear sky. Jupiter and Saturn were right in my “window”.  My front yard is framed by trees. Saturn was heading towards the trees to the west and Jupiter had just appeared out of the trees to the east. Best of all, most of the neighbors lights were off!

        I set up the scope and aligned the finder scope. My first observation was of Saturn. The image moved in and out of focus a bit as the telescope acclimated to the slightly cooler temperature. It settled down rather quickly and I was treated to a nice crisp, steady view of the ringed planet and its brightest moon, Titan. I was using a 12.5mm Coulter Optical eyepiece which gave me 12X. Before the planet slipped behind the trees I put a doubler on it for awhile.

        When I moved over to Jupiter, there were only three of its bright moons visible. I figured the fourth was either behind or in front of the planet Curious about where the fourth moon was, I consulted The Observers Handbook. I quickly found out that the fourth moon, Ganymede, was transiting across the front of the planet. Best of all, I saw that it was due to reappear in about 12 minutes!

        This is one of the reasons I like to have reference materials close at hand. I could’ve looked this up on the computer but I would have ruined my night vision in the process.

        I went to the telescope and put a Meade Ultra Wide 4.7mm eyepiece in the focuser. This gave me 32X.

        One of the first things I noticed was a sharp black dot near the center of the planets disc. Situated between the two darkest cloud bands, it was the shadow of Ganymede!

        I kept a close eye on the edge of the planet’s disc. As the time neared, (12:36AM) I started to see a bump grow. It increased in size until a little after 12:36, I could see a sliver in-between it and the planet.

        Not long after watching this, I started to tear down my set up. Jupiter was heading towards the trees and my scope was covered with dew. In all I had observed for a little over an hour and in that hour I had watched the universe in motion! As so often when observing you are looking at objects that are set in place. They are so far away you can’t see any movement at all except for the spinning of our own planet. Watching the transit of Ganymede was cool, happening upon it at the right time was lucky!

        After putting my equipment away, I went outside to check if I had left anything behind. The sky was starting to cloud over again. Seems I timed it just right! I returned to my bed because I had important dreams waiting for me!

        (Excuse my amateur drawings, they were taken from my notes)

P.S. The A.A.A.P. is scheduled another star party on September 11th, at the Wagman Observatory! You might want to mark that on your calendar!