MikePaling Posted November 1, 2017 Report Share Posted November 1, 2017 Hi .... I have been using the GSC11 catalogue very successfully in conjunction with Sequence for a while now .... but have been intrigued about some of the other options possible in the Sequence set-up area. This particular catalogue has been very difficult to track down on the Internet ..... but I have just noticed that the UCAC3 catalogue is now available to download on the ASA web site .... I can see that it is a very big set of files. Are there any benefits of using the UCAC3 cat instead of the GSC11 cat??? When & where should I consider using it??? Will it just clog up my observatory laptop unnecessarily? I do have a lot of disc space left though ! Regards Mike Link to comment Share on other sites More sharing options...
tbaehnck Posted November 1, 2017 Report Share Posted November 1, 2017 (edited) Hi Mike, ASA described it in Sequence manual: 1. Select the right reference catalogue here. In 90% of all cases, the new GSC1.1 is the right choice. Select the UCAC3 for telescopes with small fields. 2. and also in the MLPT Manual Field of larger than 20 arc minutes can use the GSC. If you have small fields you can either use the UCAC3 or the USNOA. BR Thomas Edited November 1, 2017 by tbaehnck Link to comment Share on other sites More sharing options...
MikePaling Posted November 1, 2017 Author Report Share Posted November 1, 2017 Thanks Thomas for this .... I understand now. Mike Link to comment Share on other sites More sharing options...
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