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hjk
Sinus Iridum

Poster: frank5817 (see all of this user's photos)
Description: Sketching:
For this sketch I used: Black Canson sketching paper, 9”x 12”, White and black Conte' pencils, a blending stump, plastic eraser. After scanning, contrast was decreased (-2) using the scanner.


Telescope: 10 inch f/ 5.7 Dobsonian and 9mm eyepiece 161x
Date: 8-15-2009 10:00 – 11:20 UT
Temperature: 16° C (60° F)
clear, calm
Seeing: Antoniadi II
Co-longitude: 206.3°
Lunation: 24.3 days
Illumination: 32.1 %

Observing Location: +41°37' +87° 47'
Oak Forest, Il.


mathteacher
Carpal Tunnel

Registered: 5/13/2007
Posts: 2782
Spectacular rendering... wow!
Wed Jan 13, 2010 12:08pm
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frank5817
Postmaster

Registered: 6/13/2006
Posts: 8050
Ging-Li,


Thank you. The seeing conditions that morning were almost unbelievable. It was an unforgetable observing session.


Frank Smile
Thu Jan 14, 2010 1:39am
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