Hi all,
Another late arrival, this one is from last October when the seeing was fairly good. It's looking like there could be an unlisted dome to the south east of Geminus G (Rukl 16, long 49.39° E lat 30.34° N). There was a bit of a time difference between the two AVIs that make up the mosaic so the lower section needed rotating to match up.
http://www.pbase.com/slammel/image/115961180/original (x1.1)
http://www.pbase.com/slammel/image/115960763/original (x1.3)
possible dome - http://www.pbase.com/slammel/image/115998537
I thought it might be interesting to show the librations from the 2 AVIs (1 hr 42 mins apart) with an animated GIF http://www.pbase.com/image/115999010/original (aligned at the center). I didn't expect the difference in libration to be quite so obvious but it just shows that when it is mid-wobble it can shift quite a bit. There's a slightly odd looking (but logical) visual effect where one of the shadow tips stays put (due to the libration and shadow lengthening effects being equal) and the the peak (right side of image half way up) creating the shadow moves to the left.
10in f4.8 Newtonian, Infinity 2-1M, 4x Powermate, green filter, Avistack, Registax v.5, PSE5, Focus Magic, 2 image mosaic.
Regards,
Stefan
Another late arrival, this one is from last October when the seeing was fairly good. It's looking like there could be an unlisted dome to the south east of Geminus G (Rukl 16, long 49.39° E lat 30.34° N). There was a bit of a time difference between the two AVIs that make up the mosaic so the lower section needed rotating to match up.
http://www.pbase.com/slammel/image/115961180/original (x1.1)
http://www.pbase.com/slammel/image/115960763/original (x1.3)
possible dome - http://www.pbase.com/slammel/image/115998537
I thought it might be interesting to show the librations from the 2 AVIs (1 hr 42 mins apart) with an animated GIF http://www.pbase.com/image/115999010/original (aligned at the center). I didn't expect the difference in libration to be quite so obvious but it just shows that when it is mid-wobble it can shift quite a bit. There's a slightly odd looking (but logical) visual effect where one of the shadow tips stays put (due to the libration and shadow lengthening effects being equal) and the the peak (right side of image half way up) creating the shadow moves to the left.
10in f4.8 Newtonian, Infinity 2-1M, 4x Powermate, green filter, Avistack, Registax v.5, PSE5, Focus Magic, 2 image mosaic.
Regards,
Stefan
Attached Image:
[COLOR="Navy"]
Stefan Lammel
[SIZE="Small"]
http://www.pbase.com/slammel/moon [/COLOR][/SIZE]
