I ran pempro pec on my CGE mount. This time I used
my ST-10. The pec curve for ra =x shows x centroid
as much as -112.0 Just what does this mean?

Also I noticed the maxPixal count changes a lot,
just what does this mean. If it is the size of the
star, and it changes 20% that wold through the
movement off; right?
Thanks
Harry Nash

Hi Harry,

The x-centroid position is the number of pixels delta from the starting coordinate - unless you have "X/Y in Arc-secs" checked - which in that case is the number of arc-secs delta from the starting position.

20% change in max pixel is nothing to be worried about. Max pixel varies a lot because of atmospheric seeing variations.

-Ray