月亮上的三兄弟

C.L.Chan

因三個環形山在月球南部山區 , 有著近似的直徑 , 並且直線排列 , 因而為名 .
Crater Purbach (Dia. : 118 km), Crater Regiomontanus (Dia. 126 km), Crater Walter (Dia. 128km) on Southern Part of The Moon , 2015/04/27 HKT: 20h05m, Telescope TEC Maksutov-Cassegrain MC200/20, D=20cm, F.L.=400cm, Prime Focus, Losmandy G-11 Equatorial Mount with motor drive. Camera ASI 120MC CMOS Web Cam, Shoot at 20 frames/sec, stack and process 696 frames with Software RegiStax V5 . Atmospheric Transparent : 8/10, Seeing : 7/10. Equipment borrowed from H.C.Ng. Taken at Kennedy Town, Hong Kong.