Uranus and Neptune October 10, 2015

Saturday night was very clear and steady so after the CAAS meeting I set up my camera to capture these two so called “ice giants”.  Everything worked well from tracking, to focus, to imaging. Unfortunately they are both dim and small so there is little detail to show but as you can see they both show disks and similar colors. I’ve placed Uranus on the left and Neptune on the right.  Both images are to the same scale, prime focus in a 2350 mm focal length SCT. Uranus was taken at best 50% of 500 100 ms frames while Neptune was taken at 250 ms.  Of course, besides similar color the obvious difference is size. Both are almost identical in true size but Neptune is farther.




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