Eudonia asterisca is a moth in the Crambidae family. It was described by Meyrick in 1885. It is found in New Zealand. The wingspan is 21–23 mm. The forewings are dull ochreous-fuscous, the basal and terminal areas suffused with dark greyish-fuscous. The hindwings are ochreous-grey-whitish with a distinct dark grey lunule. The hindmargin is suffused with dark grey. Adults have been recorded on wing in January.