From what I can see of the forewing pattern it looks to be a good match for A. craterana which Bold Systems 4 confirms occurs in SE NSW as well as Tasmania. I rule out A. sphaltica because the leading edge of the main whitee diagonal line is straight without a bulge in it.
Hi Don, the background was white, the UV light is making the background appear blue. Sorry the photos aren’t the best, for whatever reason I found it hard to get the lighting right for this one.