Target Setting window, target data type?

In the target setting window there is a Reference Data (J2000) dropdown box. One of the options is “File” that has an extension of .sgr. What data format would be in this file? It seems like it would be for a single object that would be selected.
Could someone post a sample data set? I have a few different list of DSOs and thought it would ne nice to make up a date set from the list that I have and use it here. My thoughts on this is that I do not always have internet and when I do it is iffy at best. If I’m not thinking right about this, just let me know.

Steve B

SGR is a proprietary target location format designed for portability (made by us). You can create SGR files by exporting a solve from the target settings. SGRs describe only a single location.