Try increasing gamma if dark sections aren't distinguished

Try increasing gamma if dark sections aren't distinguished

Tuesday, March 22, 2016

jupiter's redder red spot, detail on ganymede

jupiter's up and in prime form right now
here's my first of the season:

might be my imagination, 
but the red spot (which had been fading to tan) 
looks more red to me this year

here's an interesting one i think i neglected to post from 2 years ago look closely at Ganymede transiting the face of Jupiter:

The black dot lower left is the shadow of Io which is further left and below Jupiter.
Just below the shadow, Ganymede is crossing the face of Jupiter.  A close look at Ganymede shows the bottom is white while the top is slightly brown, demonstrating detail on one of Jupiter's moons.  Although not much, I never thought i'd get that from a backyard telescope.

More to come, including an animation of last night's double transit.

nexstar 8 GPS (8" SCT on a wedge)
3 minute capture with firecapture @ 50 fps (exposure limited at 95% histogram with gain 64)
stacked in autostakkert, Drizzle 3x, then reduced to 1.5x
sharpened in registax 6
Southern California
3/17/16 fair seeing

Ganymede transit image from 3/30/2014

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