nikonshooter Loc: Spartanburg, South Carolina

I am imaging tonight. The sky if full of stars....when looking at stars through "Polemaster" they hold a steady position (live view)....PhD2 is guiding super fine on at .5 second with a 36 signal to noise ratio - no wavering to speak of - so why in the world do I get this report that seeing is poor and tomorrow night is expected to be Bad. From my limited understanding, "seeing" is very good. I really don't care that much as I am doing deep space - narrow band - and seeing is not nearly as important were I trying to do some planetary but still .....the sky seems steady. What gives to those of you who have more science than I - which is everyone.

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SonnyE Loc: Communist California, USA

No idea Ed.
Maybe Clear Sky is looking through a cloudy lens?

I only take any report as a best guess anyway. To me, going out and looking up is more accurate.

I have a new-to-me app on my phone called Astrospheric. You might like to take a look at it. http://www.astrospheric.com/?Latitude=34.95325552024601&Longitude=-81.93228886718751

nikonshooter Loc: Spartanburg, South Carolina

Thanks for the link!

dlmorris Loc: Loma Linda, Ca

I think if you were doing high magnification (hi power) views or images of the planets, you would notice that when the "seeing" is bad, the atmosphere isn't very steady. Like looking up from under a pool of water.... If you look at the moon, you will see a lot of atmosphere motion. When the seeing is good, the atmosphere is very steady and you can use higher power. Probably for deep sky narrow band imaging, it might not be quite so important, nor for wide field imaging..