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| Jupiter with Io passing in front and above it's clouds and the shadows of both Io and Ganymede creating black discs on the cloud tops |
The images were taken on the 9th March 2014 from our backyard using a QHY 5v planetary camera attached to my 127mm Meade Apo at F 18.75 mounted on a NEQ6. Video clips were stacked using AutoStakkert and finished with APS. Images a bit washed out by moonlight and possibly thin high level cloud. Not totally convinced that image of Io is real or an artifact of using APS but the moon is about in the right place so fingers crossed!
Post Script 20th July 2014: Well the above image of Io turned out to be an artifact of using APS (Photoshop) 'sharpening tool' too aggressively. So where was Io? Well the apparent answer is quite interesting. I spent a bit of time enlarging Ganymede' shadow and realised that there was a possibility that I had taken my photograph at the precise moment Ganymede's shadow was falling upon the planet Io. Io orbits Jupiter much closer than Ganymede and therefore a solar eclipse upon Io caused by an outer moon although unlikely was a real possibility. I believe an eclipse is the answer to my missing moon Io mystery!
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| Enlarged view of Ganymede's shadow. Clearly the shadow is far from circular. I believe the less dense area of shadow (at 2 o clock) is the planet Io emerging from or entering into solar eclipse |
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| Best image processed iteratively in PIPP, AutoStakkert, Registax 6 and APS |
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| This black and white image was taken just before the above colour images |
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