[PeterM]

Steve that would be an independent discovery (equally as important) not co-discovery as you found it at a different time and location to ESO.

Completely unsure as to how any naming convention works for deep sky objects. I think it is more likely that it would become say "Crouch's object/ globular" in popular amateur astronomical circles. Officially you want to be noted as as an independent discoverer alongside ESO, just make sure that happens but it depends who follows what up from ESO. I don't think the IAU get involved other than Minor Planets, Comets etc. So here's where you may have to take the lead. Also check with DS hunters of any protocols/ precedents as they should have been there done that. At the very least I think Aust Sky & Tel as well as US Sky & Tel should hop in or you or someone you know submit a paper to both. Give it a popular name in those articles as Jay McNeill had happen with McNeills Object. Infact as you had no way of knowing it to be a globular so Crouch's Object seems the more appropriate for my mind.
Why not make a start right here with the discovery details and the image and how other amateurs maybe able to follow your path and image the same object. I'm sure Greg Bryant reads these and I would hope he makes contact with you. If not lets call on him right here to respond AND ensure it gets in the US version also. This is, like all Australian (ok Stu and NZ) discoveries big news in my book and you deserve some recognition.
PeterM.