Wrong offsets for U2782701A

Exposure U2782701 (and many others) used GSC 02528-00580.jpg as Dominant guide star and GSC 02528-00178.jpg for roll controll.

DSS-1 DSS-2

GSC 02528-00580

Clearly the DSS-2 mage, with its higher resolution, shows that the dominant guide star is a visual triple star system.
The FGS occasionally could center on one of the "companion" and not on the main star.

ComponentRA (j2000)DEC (j2000)Mag
GSC 02528-00580 ' 12:27:14.2 +31:19:29.8 10.5
GSC 02528-00580 '' 12:27:13.7 +31:19:22.0 14.3
GSC 02528-00580 ''' 12:27:14.4 +31:19:21.7 -

The centroids are measured on the DSS2 image
(hence using the DSS2 WCS).