Hyginus Astronomus Astronomica, 2.11.1.1
Andromeda.
Andromeda — She is said to have been placed by Minerva among the constellations on account of Perseus' heroism, for he had freed her from the danger of the Cetus. And he received no small gratitude for this kindly deed. For that matter, neither her father Cepheus nor her mother Cassiepia were able successfully to entreat her from abandoning her parents and her homeland to follow Perseus. Euripides wrote most adequately about this in his play titled after her.
—— trans by RTM

Several other references to Andromeda occur in Hyginus Astronomus' extensive Astronomica.


2.11.1.1 — Andromeda

Haec dicitur Mineruae beneficio inter astra conlocata, propter Persei uirtutem, quod eam Ceto propositam periculo liberarat. Nec enim ab ea minorem animi beneuolentiam pro beneficio accepit. Nam neque pater Cepheus neque Cassiepia mater ab ea potuerunt impetrare quin parentes ac patriam relinquens Persea sequeretur. Sed de hac Euripides hoc eodem nomine fabulam commodissime scribit.