In Apollonius Rhodius' Argonautica, one of the Argonauts was named Asterion. He was the Son of Kometes, from Thessalian Peiresia, near the junction of rivers Apidanus and Enipeus. He appears in book 1 line 35 and nowhere else.
Kometes & Aigialeia
"Asterion, whom Cometes begat by the waters of eddying Apidanus; he dwelt at Peiresiae near the Phylleian mount, where mighty Apidanus and bright Enipeus join their streams, coming together from afar."
- Apollonius of Rhodes, Argonautica 1.35