柏拉圖隕坑 2019 10 18

C.L.Chan

柏拉圖隕坑, 直徑 100km, 深度約 3km. 比大帽山高三倍. 坑內注滿黑色的玄武岩岩漿, 坑府比雨海高出 500m. 坑內只有微形隕坑 .

Crater Plato, 2019/10/19 HKT: 23h48m,Telescope TEC Maksutov-CassegrainMC200/20, D=20cm, F.L.= 400cm, Tele Vue 2x Powermate, total focal length is 800cm, Losmandy G-11 Equatorial Mount with motor drive. Camera QHY 5III 224 Color Cam, frame size 1280 x 960 px, Shoot at Gain=40,Expo= 0.45ms/frame, Gamma=112, frame rate=30-107 frames/sec, avi format, stackand process 25% best frames in 2612 frames,­ with Software AutoStakkert 3 ,wavelet with RegiStax V.6 , final tough by Microsoft Photo,  Atmospheric condition : Transparent : 8/10,Seeing : 8/10. Equipment borrowedfrom Mr. Ng. Photo taken at Kennedy Town 堅尼地城, Hong Kong.