Astronomy can be a real pain sometimes. The sky was clear for tonight's Triton occultation right up to around a minute before the expected time. Clouds then rolled across during the critical three minutes and then cleared. The image shows a single 1.6s frame from the video just before occultation was about to start. The full video at x16 real time is here. I suspect that the clouds mean that not a lot can be recovered from it.