I cannot answer this. It must inspire respect, though. Have a strong meaning.
Stars tend to be named after beings of power. It would work.
Auriga, maybe? Or Deneb. I do not know very many...
It will be a god in the shape of a dog, then. A protecting dog companion. Alignment? For good traits, I will say "loyalty" and "sacrifice."
A sense of community as the third positive trait.

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