Reply To: Magnitude precision on BAA-VSS charts.

[Mr Ian David Sharp]

Personally I like the AAVSO charts and lists of comparison stars because it’s easy to query via my Python code via the AAVSO API. I combine that with SIMBAD/VIZIER data to get other parameters of the target star and I can then create a good list comparison stars for ensemble photometry. I just live with the chart ID warning when I upload to the BAA database.
Cheers
Ian.