Southwestern Mare Tranquillitatis

Sketching and Equipment:
For this sketch, I used black Strathmore 400 Artagain paper 9” x 12”, white and
black Conte’ pastel pencils and blending stumps.
Telescope: 10 inch f/5.7 Dobsonian and 6 mm eyepiece (241x) riding on an equatorial platform
Date: from 01-04-2017 to 01-05-2017; 23:15 - 02:00 U.T.
Temperature: -9° C (15° F)
Clear, breezy
Seeing: Below average - Antoniadi IV
Transparency 4/5
Colongitude 352.0 °
Lunation 6.5 days
Illumination 38 %

Frank McCabe