Asktheheaven
Tuesday, November 08, 2011
近 地小行星 2005YU55(右下角 trail), 11.1 星等, 曝光一分鐘, 攝於HK 時間 2011 Nov. 9 下午 2:20 (06:20 UT), 遙控美國4" 鏡拍攝. 移動速度每分鐘四角分(248"/min), 即 trail 長度約相當於1/7滿月.
左上角trail 乃人造衛星!
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近 地小行星 2005YU55(右下角 trail), 11.1 星等, 曝光一分鐘, 攝於HK...
王廸詩談寫作
東周行星獵人
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