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Messier 51


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About this observation
Peter Tickner
Time of observation
02/03/2020 - 00:24
M51 - Whirlpool Galaxy
Observing location
Urban Berkshire
ZWO ASI071 MC Pro CMOS camera
14inch LX200 SCT at f/10 and 130mm triplet APO
EQ8 mount and EQ6 mount
OAG with Lodestar X2 Autoguider
0.75 reducer with the refractor image

This is two images of M51, the top one is a small section of an image taken through my 130mm refractor using a 0.75 Riccardi reducer at 1x1 binning and the lower image through my 14inch SCT at 2x2 binning, using the same OSC camera for both images.   The top image is a stack of 12x300seconds and the lower image is 30x300seconds.

It was an interesting comparison and shows how sensitive modern colour cameras have become.  Flats and darks subtracted from both images.


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