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Youthful Tycho Crater
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For this sketch I used: black Strathmore 400 Artagain paper, 8”x 11”, white and black Conte’pastel pencils and a blending stump. Brightness was slightly decreased (-7) and contrast increased (+5) after scanning using Microsoft Office Picture Manager.
Telescope: 10 inch f/5.7 Dobsonian and 6mm eyepiece 241x
Date: 3-17-2008 0:45 - 1:55 UT
Temperature: -0.8°C (31°F)
high cloud cover and high humidity, calm
Seeing: Antoniadi III
Co longitude: 28.1°
Lunation: 9.3 days
Illumination: 77.2 %
Observing Location: +41°37' +87° 47'
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