蛇谷 2019/10/11

C.L.Chan

蛇谷, 由明亮的阿里斯塔克斯隕坑, 平底的希羅多德隕坑及一條由岩流鑿出的巨大月溪所組成, 酷似眼鏡蛇而得名.

Snake Valley, 2019/10/11 HKT: 20h37m,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=45,Expo= 0.7ms/frame, Gamma=112, frame rate=30-107 frames/sec, avi format, stackand process 23% best frames in 4228 frames,­ with Software AutoStakkert 3 ,wavelet with RegiStax V.6 , final tough by Microsoft Photo,  Atmospheric condition : Transparent : 7/10,Seeing : 7/10. Equipmentborrowed from Mr. Ng. Photo taken at Kennedy Town堅尼地城, Hong Kong.