Quote:
Originally Posted by Astro_Bot
It was a pretty good night out tonight (Thursday) with good seeing up until about 9pm. No sign of smoke tonight. 
I set up early initially for a visual session, but Saturn looked good at ~350x so I hooked up the camera and laptop and got in a few imaging runs. Hopefully, they'll turn out alright.
After that, it was back to visual and a nice tour of a few favourites.
I did notice a dramatic difference in transparency, and refraction, between low elevations and near the zenith - more than usual.
The jetstream forecast showed slower wind speed in a modestly-sized hole passing over Brissie between about 4pm and 10pm. By my estimation, that forecast was pretty accurate. |
Hmm i didnt bother getting the scope out with all the smoke and nastiness around yesterday. all the stars were twinkling madly as well, so I knew seeing was poor where we are. I wonder if local conditions greatly affect the seeing compared to someone else only a few ks away?
anyway I hope this link might be of use to some people:
http://www.ehp.qld.gov.au/air/data/s...=Previous+hour
it shows visibility and general concentrations per volume unit of air for different particle sizes (click latest hour to get the latest hour of data). Earlier in the week, visibility for CBD was 7 (you can go back in time using the date ranges), which corresponded to the great conditions everyone was seeing. And of course with all the smoke around the figures have gone quite bad, especially this morning.
Astro_bot looks like your obs were inline with an improvement in visibility come sunset though!
Where abouts are you in Brisbane?