> Dark, clear skies matter a great deal, and in that regard a number of places in Arizona that may not offer > regular sub-arcsecond seeing nevertheless rate as excellent sites because > they allow viewing of dim objects that cannot be seen as well (or at all) > from sites not as dark and/or transparent. I agree, and fortunately (but not for mature understanding), I have yet to experience consistently dismal dark conditions. After speaking with east coast amateurs at the GCSP, I gained a greater appreciation of what our state has readably to offer. Adding to my spoiled bias, I have also been fortunate to live in area of Scottsdale that apparently produces good seeing on the order of 400-560x sixty percent of the time. I'm sure this is what fuels my uselessness attitude toward lower magnifications. I admit, dark and transparent conditions have allowed me to observe many obscure objects and features through my 10". However, at magnifications below 250x, the detail in the deep sky objects becomes a wash and as a result, the night is spent observing open clusters ;) and large, bright show pieces. In the case of planetaries, this is a major disappointment, as well as for faint fuzzies with subtle detail. I think AZ skies are typically good for seeing (average 250-300x), just Sunglow is consistently below that standard. > Band details and festoons were crisp and clear, and most memorable to > me is that it was the only time I've ever seen clear detail on > the face of Jupiter's moon Io. Curious, what detail did you observe? Was Io in transit or isolated? Similarly--and at Sunglow--on two occasions I observed "structure" on Io. The latter instance I'm less confident in than my first encounter. -FRANK --- This message is from the AZ-Observing mailing list. If you wish to be removed from this list, send E-mail to: AZ-Observing-request@xxxxxxxxxxxxx, with the subject: unsubscribe. The list's archive is at: //www.freelists.org/archives/az-observing This is a discussion list. Please send personal inquiries directly to the message author. In other words, do not use "reply" for personal messages. Thanks.