From: Milton Aupperle <milton@outcastsoft.com>
Date: January 18, 2007 7:04:02 PM MST
To: Astro_IIDC@yahoogroups.com
Subject: Re: [Astro_IIDC] Lunar Mosaic
Hi Alan;
Thanks for the kind words.
It was really windy and the scope would rock +/- 20 arc seconds. Luckily it was only around -10°C then or the wind chill would have been really bad. At high altitude turbulence was fairly light. Too bad it wasn't calm on both fronts. I was shooting at 3.3 ms exposure times too, which likely helped reduce motion a fair bit.
About the only surprising thing was that it looks like the floor of crater Abel might be domed or at least raised. If you zoom in on that crater to about 200% to 300%, you can see that the central section of the floor is in sunlight like a little island surrounded by a sea of darkness. I sent a query off on this to Charles Wood on this, but have not heard anything back yet.
Using the color saturation tool in Astro IIDC really brings out the subtle color differences. Bluish mare areas are Titanium richer lavas where as the reddish mares tend to be poorer in titanium and richer in iron. And the bluish white ray material is unweathered pulverized anorthosite rich rock around recent impacts. The strong greenish blue coloration to the south pole area around Demonax and Scott likely indicates spill over form impacts on the far side.
PS: I got Both "The Modern Moon : A Person View" and Rukhl's Lunar Atlas for x-mas, so I've been reading a fair bit when I get time - hence the detailed summary.
TTYL..
Milton J. Aupperle
President
ASC - Aupperle Services and Contracting
Mac Software (Drivers, Components and Application) Specialist
#1005 - 815 14th Avenue. S.W.
Calgary Alberta Canada T2R0N5
1-(403)-229-9456
www.outcastsoft.com
On 18-Jan-07, at 8:13 AM, Alan Friedman wrote:
HI Milton -
Nice image capturing a wide view of region shown in Stefan Lammel's close-up on
LPOD today.
Sounds like a big wind for your mount. I was watching saturn shake and shimmy in
just mild winds last night with my A/P 900 mount, albeit at a focal length of 11
meters.
cheers-
Alan