Dorsa Smirnov is a 156 - 220 km long wrinkle ridge system located at 27.3°N 25.3°E in Mare Serenitatis on the Moon. It is not entirely clear how far the structure extends to the north. The approximate center of the ridge is the small crater designated Very. At the southern end, the ridge disappears almost completely into the Mare. The northern end stops at crater Posidonius Y, where the ridge splits into two ~90° branches. The ridge system was named after Russian geologist Sergei Sergeyevich Smirnov (1895-1947) by the International Astronomical Union in 1976.
Crater Posidonius and the snake-like Dorsa Smirnov captured with a 8" f5 reflector and vesta pro webcam. Prime focus.
Clear twilight sky. Moderate seeing, Moon low in sky.
