IWLOP #083 - Rupes Recta
The famous "Straight Wall" is one of the most interesting features on the Moon.
Location: 22.0 S 7.0 W Origin: Tectonic Length: 110 km Rukl: 54 Type: Scarp
Objects: Rupes Recta, Birt, Promontorium Taenarium, Birt A, Rima Birt
Others Identified: Nicollet, Thebit, Thebit A
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Observation 1: Variable high clouds. R1: The Straight wall was barely visible.R2: The crater Birt in Mare Nubium to the west was easily identified. R3: Promontorium Taenarium was very large - 1/4 as long and almost as long (east to west) as the Wall. The curve of the peaks made it look like a wall of a much larger crater (now gone). |
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Observation 2: C1: Birt and Birt A were easily identified adjacent to the Wall. The shadow extended just west of Birt almost perfectly parallel to the Wall. Because this part was near the terminator, I could see the worn down crater wall (refer to note). Rimae Birt ran parallel to the Wall, running north of Birt; it was about half the length of the Wall. NOTE: (July 4/21) It always strikes me that there had been a large crater in this section of Mare Nubium because of the hint of a circular wall in the Mare floor. |