里伊塔月谷 2020 04 27
里伊塔月谷, 在月面東南山區, 本來是酒海形成時的拋射物所造成的, 但給後來的其他撞擊事件有點破壞了原貌, 月谷長445公里, 寬 10到30公里. 它是月正面的長谷亞軍. 今晚首次用8米焦距拍攝這個對像. Vallis Rheita , 2020/04/27 UT: 11h58m, Telescope TEC Maksutov-CassegrainMC200/20, D=20cm, F.L.=400cm, with 2x Powermate , E.F.L.= 8 meters, LosmandyG-11 Equatorial Mount with motor drive. Camera QHY 5III 224 Color Cam, Capturewith FireCapture, Shoot at Gamma=110, Gain=44, Expo= 3.1ms/frame, frame rate 49frames/sec, avi format, stack and process 80% best frames in 1654 frames, withSoftware AstroStackert 3 , wavelet with RegiStax V.6 ,Atmospheric condition : Transparent : 8/10,Seeing : 8/10. Equipment borrowedfrom Mr. Ng. Photo taken at Kennedy Town堅尼地城, Hong Kong.
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