Posted 08 February 2014 - 09:22 PM
Frank, yea, I've been impressed with the scope. It's a keeper. The biggest thing is excellent seeing, cooled and collimated. Wow, the combination offers views that exceed my wildest expectations. But, yes, it's not always visible due to seeing. This is only my third sighting in many, many attempts.
I appreciate your take on the sketch and technique. When I first drew it, I chuckled to myself because I though it looked silly. But, I wanted to illustrate the rille. It grew on me and it turned out okay.
Jef, I always find lunar sketching rather difficult in that there is so much detail (more than the sketch lets on.) But, it seems you have time as it does not rotate like Jupiter. So, maybe it's not as difficult and I want to try more sketches.
Ken, you got that right. Maybe I will spend more time with the moon.
Tommy, you bet. It's a holy grail. For the longest time I figured it could not be done in a 6" aperture, I was shocked when it appears it can be - if conditions are exactly perfect. Last night, I think the valley was about 2 days out from the terminator, maybe that's a key point in lunar observation.
What was interesting was the soft bright wall and the soft dark shadow defining it. Then the rather sharp edge to some apparently darker albedo that seems to define it, as well. After doing some research, it turns out that section near the center of the valley is the widest at about 1k and deepest part of the rille. That adds confidence to the sighting.
Thank you all...