I like Astraea best from the names you listed! What about:
Amalthea
Andromeda
Callisto
Io
Bellatrix
Venus
Adhara
Alcyone
Capella
Chara
Irena
Merope
Maia
Mira
Izar
Petra
Rigel
Talitha
Vega
Phoebe
Rhea
Calypso
All are star, moon, constellation, or galaxy names (some more obvious than others!). I especially like Andromeda, Calypso, Rhea, Alcyone, Vega, and Adhara for her!
Good luck!