When Zulu got there, the the system map solar mass value was "1.0000", strangely enough.
The 1,300 solar masses seem to come from confusion with GCIRS 13E, btw. (Not the first time I saw it confused with Sag A*'s mass, either.)
1.0000 ? Wow that is some cool trivial. So that means they did attempt to "fix" it, but for some reason used another low mass number? Very strange. Good eye with the GCIRS 12E catch, btw. Wikipedia is getting more and more astounding each year. Pretty soon it will surpass google.