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ucac 4

Posted: 19 Jul 2020, 04:23
by cjacobson
I have spent some time at the Naval Observatory web site for a downloadable data base(index). I find lots of peripheral information but not a downloadable large file. Where is this??
Also what are the camera and focal length aspects of your trial files for practice. I could not plate solve them.
thanks cjacobson

Re: ucac 4

Posted: 20 Jul 2020, 01:34
by bill
Hi cjacobson,

You can use an ftp client to access and download the UCAC4 catalog here:

Take note that there is no one single data file to download but many in separate directories. Total data to download will be about 8.4GB

I don't have the info. for the trial files, maybe Fabio has this info.


Re: ucac 4

Posted: 22 Jul 2020, 17:53
by fabdev
Hi, the horizontal size of several Messier images (M63, 67, 81, etc.) is 13.5 arcminutes. There's a mini tutorial with the M67 image in the Help about "Find coordinates".

Re: ucac 4

Posted: 27 Jul 2020, 03:20
by cjacobson
thanks for the information cjacobson