Destination ETA is an OXP for Oolite 1.76 and 1.77 that improves the functionality of the Advanced Space Compass, and is compatible with most HUDs. It was inspired by the distance and time to target function written by Spara for Aad-HUD, and still contains a few lines of code copied from that OXP (the vector calculations which are all Greek to me).
Simply place the Destination ETA OXP into your "AddOns" folder. It adds a continually updated estimated time to arrival for your currently selected compass target which appears whenever you're at green alert. It also includes a spectroscope function which reveals the additional information about stars added by the Distant Suns OXP, but is fully usable without that.
Please use this forum thread for questions, comments or difficulties related to this OXP.