里伊塔月谷
里伊塔月谷 , 是左方的一道裂谷 , 是全月第二長的裂谷 , 成因未明 , 長445km, 闊 10-30 km.Vallis Rhita, 2019/10/04 HKT: 19h43m,Telescope TEC Maksutov-Cassegrain MC200/20, D=20cm, F.L.= 400cm, LosmandyG-11 Equatorial Mount with motor drive. Camera QHY 5III 224 Color Cam, frame size 1312 x 1008px, Shoot at Gain=43,Expo= 0.5ms/frame, Gamma=112, frame rate=33-106 frames/sec, avi format, stackand process 25% best frames in 812 frames, with Software AstroStackert 3 ,wavelet with RegiStax V.6 , Atmospheric condition : Transparent : 8/10,Seeing : 7/10. Equipmentborrowed from Mr. Ng. Photo taken at Kennedy Town 堅尼地城, Hong Kong.
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