Grouping individual targets eg Leo Triplets

[theskyhound]

Is there a way to have a group label for targets in a target list which may be imaged together.  For example I have added M65, M66 and NGC 3628 separately in a target list but together they are commonly known as Leo Triple or Triplets and are often imaged together with a suitable set up.  Another example would be M81 and M82 which are often imaged together.

Hello. There are many possible ways to answer your question, including that most prominent galaxy groups/clusters do have catalog designations. Examples range from the Virgo cluster to Seyfert's Sextet. The Leo Triplet hasn't been cataloged as a galaxy cluster because its just a grouping of three bright galaxies and the astronomers who compiled the galaxy group catalogs didn't find them useful to include. You could make your own Leo Triplet database entry using the Supplementary Deep Sky feature, accessed via the Data menu. But that just gets you a position in the sky with a label. 

Here's the thing: you can't do exposure calculations on a position in the sky. So better to choose one of the galaxies as your target and expose for that one. When you create a project, drag the FOV on the Composition tab to include all three galaxies.