Rupes Recta and Rima Birt
Sketch and Details by Balázs Benei
This is my other sketch, I made it at the beginning of April. Rupes Recta was very easy to observe, it was totally in the field of vision. Rimae Birt was not so easy but I could see it firmly. The seeing was very good at times, I could observ the crater Birt D, which had only 3km (~2miles) diameter. I think this was the end of the definition of my telescope. I made the sketch with graphite pencil.
My equipment: 110/800 (4′) Newtonian reflector, 2x barlow, 10mm eyepiece, 160x magnification.
Object name: Rupes Recta, Rimae Birt
Object type: Lunar rille, Lunar rimae
Location: Gyöngyös, Hungary
Date: 2009. 04. 04. 17:35 – 18:55 UT