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Walled Plain Crater J Herschel


Walled Plain Crater J Herschel

The sun was rising across the 165 km wide irregular floor of this ancient crater at the time of this observation. Sketching: For this sketch I used: White CCP sketching paper, 2 HB graphite pencil and a black ink pen. Contrast and brightness were adjusted after scanning. Telescope: 10 inch f/ 5.7 Dobsonian and 6 mm eyepiece 241X Date: 5-28-2007 1:01-1:40 UT Temperature: 16° C (60° F) Partly cloudy with haze, calm Seeing: Antoniadi III Colongitude 45.1 ° Lunation 11 days Illumination 85.8 %






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