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Mare Humorum

Poster: frank5817 (see all of this user's photos)
Description: Sketching:
Sketch was made over two observing sessions
For this sketch I used: white sketching paper 10x 8, HB, 4B, 6B graphite pencils, a blending stump and a plastic eraser and eraser shield. After scanning, Brightness was decreased (-2) and contrast increased (+2) using Microsoft Office Picture Manager.

Telescope: 10 inch f/ 5.7 Dobsonian and 6 mm eyepiece 241x
Dates: 8-15-2009, 9:30-10:25 UT; 9-13-2009, 10:00-11:10 UT
Temperature: 15 C (59 F), 16 C (61 F)
clear, calm, then cloudy the first day, Very humid both days, dense fog on the second day
Seeing: Antoniadi II-III
Colongitude 205.5, 200.2
Lunation 24.27 days, 24 days
Illumination 32.7 %, 35.3 %

Frank McCabe

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