The AAT's Boltwood cloud sensor recorded it getting cloudy between about 11 pm and midnight, and between about 12:30 am and 3 am, i.e. most of the best (darkest) part of the night between the Moon setting at 12:20 am and astronomical twilight at 5:20 am was cloudy.
I thought that would have wiped out the Thirty Millimetre Telescope for most of the night too, but when I checked what it got this morning i was pleased to see that it soldiered on through breaks in the clouds and seems to have got some good data on a couple of targets I really, really wanted to get while I was here. I think the cloud was worst in the direction I was taking the timelapse, and was patchier in other parts of the sky.
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