M8礁湖星雲

C.L.Chan

M8礁湖星雲(左) 與NGC 6544 (右), 前者是個發光星雲 , 是恆星誕生的地方 , 它中央生成了一個疏散星團 NGC 6530. NGC6544有右邊 , 是個古老的球狀星團 . 攝於城市中的天台 .
M8 & NGC 6544 in Sagittarius, Total 255 sec exposure. 2019/08/27, HKT 22h33m to 40m , Telescope: Astro Physics, Star 12 ED, D=12cm, F.L.=102cm, Prime Focus with field flattener lens and Astronomik light pollution filter, Losmandy G-11 Equatorial Mount with motor drive. Manual object targeting. Canon EOS 700D Camera , IR Low pass filter removed. ISO3200, 15 sec exposure each x 17. CRW Format. Light frames 10x, Dark frames 10x, Bias frames 10x, flat frames 10x. Stacking by Deep Sky Stacker freeware and post-processed by GIMP & Microsoft photo . Atmospheric Transparent : 7/10, Seeing :7/10. Equipment borrowed from Mr. Ng. Taken at a roof top of Kennedy Town, 堅尼地城Hong Kong .