除夕夜找到獵戶的紅寶石

C.L.Chan

除夕夜找到獵戶的紅寶石

  編號M42大星雲 , 是個肉眼可見的發光星雲 , 它像一顆紅寶石 ,  鑲在臘戶腰帶上的一把寶劍的劍套上.星雲會聚集形成數以千計新生恆星 , 是星星的”產房”, 發光原因是新生恆星的紫外光激發星雲中的氣體發出獨有的紅光 .

M42in Orion, 100 sec exposure. 2018/12/31, HKT 21h21m to 31m , Telescope: Astro Physics, Star 12 ED, D=12cm,F.L.=102cm, Prime Focus with field flattener lens and Astronomik lightpollution filter, Losmandy G-11 Equatorial Mount with motor drive. Manualobject targeting. Canon EOS 700D Camera , IR Lowpass filter removed.  ISO3200, 10 secexposure each, total 100 sec. CRW Format. Light frames 10x, Dark frames 10x,Bias frames 10x, flat frames 10x. Stacking by Deep Sky Stacker freeware andpost-processed by Microsoft photo . Atmospheric Transparent :7/10, Seeing :7/10.  Equipment borrowed from Mr. Ng. Taken atKennedy Town, 堅尼地城Hong Kong .