Tuesday, April 8, 2014

Mars Opposition, Ganymede

i know i've sent lots of Jupiter this season

but it's still up there and i caught something surprising the other night:
you can clearly see Jupiter, moon Io lower left and Io's shadow at the lower left edge of Jupiter.



look closely below the shadow lo
lower left and you can see Ganymede transiting the face of Jupiter
now look closer still at Ganymede and you'll see the bottom half is white and the top half brown...
meaning surface detail on one of Jupiter's moons has been resolved
which is a new milestone for me
(8"SCT FL ~2000 mm, ASI 120 MC Camera, stack of ~500 of 10,000 5ms video exposures)

Mars is at opposition right now!
prime viewing will last for another week or so, then it won't be back for 20 months, so go out and see it now
here's a shot from last night during poor seeing:

same specs as Jupiter

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