The phrase "ascertain about the" is not correct in written English.
The correct usage would be "ascertain" without "about," as "ascertain" already implies finding out or determining something.
Example: "I need to ascertain the details of the project before proceeding."
Alternatives: "determine the" or "find out the".
Among the few facts we've been able to ascertain about this body is that it is tiny (just 17 miles across) and distinctly nonspherical.
Sometimes they said that, sometimes they didn't, depending on what they had previously ascertained about the presence of other Polish people in a locality.
It was unclear what information the German government had ascertained about those other four alleged nationals.
From what we can ascertain about his fiancée so far, it's easy to see the appeal.
In order to ascertain about molecular structures of monomers, quantum chemical study was carried out.
Significant parts of scientific investigation are carried out on models rather than on reality itself because by studying a model we can discover features of and ascertain facts about the system the model stands for; in brief, models allow for surrogative reasoning (Swoyer 1991).
Interviews with family members and close friends can also increase the chance to ascertain information about the patients' memory, personality, and behavior changes.
The object of the Apostles' discussions was to ascertain Truth about the world, and these brilliant undergraduates — who became fast friends — really believed they could do that.
Therefore, the unusual features of the strain M18 against various fungal phytopathogens and bacteria prompted us to sequence the complete genome of this strain to ascertain more about the genomic structures, with specific reference to this expression pattern at different temperatures through analysis of microarray-based transcriptome profiles.
Now, Nokia, if a mobile device can ascertain information about the call source beyond what kind of communication it is to the caller or email source, it is very possible to do more to modify the ringtone by adding a secondary enhancement to the base ringtone.
