Tuesday, 2 July 2019

Features in Double Stack - 2nd July

Double stacking a scope reduces continuum leakage and so enhances the contrast of features, which for looking for the ghosts of cycle 25 is a bonus. So the obvious thing to do was to use the Daystar Quark with the SM90, using 2x2 binning got the effective pixel size up to a whopping 7.3um which works better for the f38 i'm now running the system at (certainly compared to the 3.69um native pixel size of this GH camera).

First image the filament and relic plage that is mid disk, these are cycle 24:

Then to S6205, the little ephemeral bright point associated with cycle 25 in the southern hemisphere.