Plato and Alpine Valley

December 19, 2007

Uploaded 2/3/08

North is up in this image, more info below.

1290 x 960 size

 Another image from this evening, where the seeing was sometimes actually pretty decent. This over the limb spaceship type view is dominated by the 60 mile in diameter walled plain Plato, just to the left of center. Several tiny craterlets can be seen inside which is certainly a test for a better night. The mountain range across the center of this image is Montes Alpes, with some peaks reaching over 7300 feet. On the right side is the large gash like valley, Vallis Alpes or more commonly known as the Alpine Valley. It is 80 miles long but only 7 miles wide. You can just see hints of the central quarter of a mile wide rille on its floor, indicating that I'm certainly approaching under half an arc second resolution in this image.

Processing: 300/1000 best frames, MAP 55 alignment in Registax, Wavelets in PixInsight Pro, Levels and Contrast Masking In Photoshop CS3, Focus Magic Plugin.

Instrument: 12.5" f/5 with 1.8x Barlow Platform: Astrophysics AP1200 CCD Camera: Image Source DMK 31AU03.AS Filter: Hoya R72 Exposure: 1/60 sec 15fps Location: Payson, Arizona Elevation: 5150 ft. Sky: Seeing good, Transparency 8/10 Outside Temperature: 35F Processing: Registax, PixInsight Pro, Photoshop CS3, Focus Magic Plugin