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Theophilus and Apollo 16
Theophilus and Apollo 16 at Orion Store
Theophilus and Apollo 16 at Orion Store
Date Taken: 08/05/2011
Photographer: Gary V.
Location: Pembroke Pines, FL
Telescope: Orion SkyQuest XT8i IntelliScope Dobsonian Telescope (Item # 10018)
Mount: Equatorial platform (Cylindrical Bearing Platform, build it yourself kit from TL Systems)
Camera: Orion StarShoot Solar System Color Imaging Camera IV (Item # 52175
Processing: Extracted segments from the .AVI file with Virtual Dub software, process images with Registax 5, image overlay done with Photoshop 7
Exposure: 15fps at 1024 X 768
Other Equipment Used: Orion Shorty 1.25" 2x Barlow lens (Item # 08711)

Visual measurement of the distance the terminator advances over exactly 24 hours time. These two images were captured exactly 24 hours apart. The image to the right, taken August 4th and the other August 5th 2011, during waxing Moon. The upper crater in the cluster with central peak is Theophilus. (approximately 68 miles in diameter and 2.5 miles deep. It's multiple central peaks reach upwards of 18,000 feet). The terminator advances just over 12 degrees per Earth day, approximately 200 miles. The small red circle to the Northwest of Theophilus approximately marks the Apollo 16 landing site. Some Lunar samples returned by Apollo 16 are believed to be ejecta from Theophilus.

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