Just to mention that this "she" is actually a "he".
Being a pedant, and also somewhat anal, I couldn't call myself Ursus major as there is no such constellation (as far as I knew/know)... not to mention that, as someone interested in US railroads (and model railroads), I found it pleasing that Ursa is also an anagram of USRA** (the United States Railroad Administration).
There is also a male Ursa Major in the Marvel universe (both comic and cinematic), but I was unaware of this when I chose my username.
** - USRA was and is a gift for the manufacturers of model US steam locomotives (and those of their customers who don't want to have to choose between paying a lot more money or buying unrealistic toy-like models). USRA designed
a set of "standard" steam locomotives that were used by many the numerous private railroad companies (either as designed or adapted from the USRA designs). This meant that those manufacturers could sell models of real-world locomotives and so could be used (either straight out of the box or with minor modifications) on model railroads based either on many of the real ones, or imaginary railroads whose builders/owners wanted them to look as "authentic" as possible. (Oh, and did I mention that I was a bit anal....)