Blair, Grant Feb 12, 2017
I can confirm - just did the same operation (9.1, too) – shows as a stunning 3.7 for me, also.
It looked like Guide was able to pull data from internet sources – quite often this “Click to download updated comet data and it to Guide” option fails for me. On this occasion, it at least partly-worked.
updated comet info on guide 9.1 comet 45P magnitude is 3.7 why is it wrong and how to fix it ?