Thanks for this download, Patrick. I unpacked the three zipfiles and then compared the display of a 30'x30' region centered on NGC5437. That's an area where I had already been doing a comparison of a DSS (POSS-1) image to the displays in AstroPlanner 1.6.1, Cartes du Ciel 2.76c, and Stellarium 10.
This is how CdC displays the region with the 6.03GB USNO-A2.0 catalog: http://picasaweb.google.com/lh/photo/Swwe9yCyeXy6EzPDIsoRaQ?authkey=Gv1sRgCIPkqr\ -IzuuSfQ&feat=directlink Alternate URL - http://tinyurl.com/yklp97t This is how CdC displays the region with the new 2.37GB UCAC3 catalog: http://picasaweb.google.com/lh/photo/9VptoyFcGFFnrOJIAB81cw?authkey=Gv1sRgCIPkqr\ -IzuuSfQ&feat=directlink Alternate URL - http://tinyurl.com/yjoyb5j And here is a DSS (30'x30' POSS-1) image of the region: http://picasaweb.google.com/lh/photo/xD9249kw6g7Ik9kmgs3_0A?authkey=Gv1sRgCIPkqr\ -IzuuSfQ&feat=directlink Alternate URL - http://tinyurl.com/yjh59p4 FYI, this is a link to all of the screenshots in my comparison - http://picasaweb.google.com/pricklypearpixels/USNOA2_0Examples?authkey=Gv1sRgCIP\ kqr-IzuuSfQ# Alternate URL - http://tinyurl.com/yz3b78w I hope these comparisons are of interest to some of you out there. My conclusion is that the new 2.37GB UCAC3 is good enough to show me more stars than I can see in the eyepiece of my 14" reflector, but with disk space so cheap these days I'll probably keep the 6.03GB USNO-A2.0 installed to use in both AP & CdC, and delete the UCAC3 catalog. - Jim in Austin, TX
