Jun 042017
 

It’s been a while!  I have to admit that I didn’t update the site with some deep-sky images I took over the winter, and the observatory has been offline since early March due to construction, so I missed the vast majority of this year’s Jupiter apparition.  However, I ran a temporary power supply to the observatory last night, to clean things up, check out the gear, and get the roof open.  While taking a look at Jupiter, I was fortunate enough to get a view of the double shadow transit (of Ganymede and Callisto’s shadows) while Io was transiting the face of Jupiter — a very rare and interesting sight!

Conditions were poor, with wind and a strong jet-stream overheard.  As well, Jupiter was well past the meridian and sinking into the western sky when this was taken.  Ganymede is to the upper right with Callisto below it, and their shadows transiting the face of the planet.  Io is a barely perceptible white dot on the Northern Equatorial Band.

Taken at prime focus of the C14 with the PGR Flea3 camera and Astrodon filters.  The lower magnification was needed to get the moons in the frame.

And a close-up view of the planet with Ganymede, about 20 minutes prior to the beginning of the shadow transit.

update:

One more image of the double shadow transit, taken just after the one above.

 

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