Celestial hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  IC 4277  ·  IC 4278  ·  M 51  ·  NGC 5194  ·  NGC 5195  ·  Whirlpool Galaxy
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M51, Chris Pagan

M51

Getting plate-solving status, please wait...
M51, Chris Pagan

M51

Equipment

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Acquisition details

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Description

This image is a great example of the problem I am having with my stars showing bloated color channels.  Some stars have red bloats and some have green bloats.  I believe this may be a result of the 7 pounds of imaging equipment "slightly " shifting as the scope changes angles throughout the evening.  I have a Moonlite focuser which is supposed to handle the load and it does a fine job moving the tube to achieving focus and maintains position.  I capture each channel as a block so each channel is in a different position as it acquires the data. 

My proposed solution is to change filters every couple of subs (known a cycle round in Voyager) so that any "shift" throughout the night spread out between filters.

I will follow up with the results.

Comments

Sky plot

Sky plot

Histogram

M51, Chris Pagan