Responsible metrics for astronomy: Comparing ADS to other citation databases

The Astrophysics Data System is well established as one of the most prominent discipline specific citation databases. As such, it is a rich source of astronomy related metrics. It has been specified as “designed to be useful to astronomers, not bibliometricians”. There is a general agreement that the coverage, metadata and classifications found in the more general citation databases such as Web of Science and Scopus do not serve needs of the astronomy and astrophysics community equally well. 
The Leiden Manifesto for Research Metrics (2015) calls for bibliometricians to account for variation by field in publication and citation practices. We need certain standards to ensure that the metrics from the various citation databases we use is responsible, and employs state of art methods. This must be true for all citation databases, including ADS. 
Using a 2012-2016 publication dataset from the University of Helsinki research evaluation, we check the astronomy / physics divide of this set using (1) ADS (2) a citation network clustering algorithm promoted as suitable for research evaluation. We also check (3) the Scopus based Topics and (4) the research field results of the new Dimensions citation index that uses AI tools.