在台灣大雪山拍攝深空天體之三 北美洲星雲 , 因其形似而得名 , 是發光星雲及暗黑星雲的混合體 . 此星雲位於天鵝座的銀河內, 恆星繁多 , 它受多顆恆星所激發 , 令星雲中的氫氣發出特有的紅光 , 但有一團暗黑星雲闖進這個區域的中央 , 摭擋了星雲的部份發光區域 , 顯出北美洲的外形 ... North America Nebula , 2016/12/03, HKT 20h21m to 20h34m, Canon ESO700D Camera, IR Low passfilter removed. Canon Zoom Lens EF 50-200mm, Set at f.l. 200 mm, f/5.6, , ISO 1600, Exposure 30sec. for each frame. With motor drived Halley Equatorial Mounting. Atmospheric transparent : 7/10, Seeing : 8/10. Manual Object Targeting. Processed and stacked byfree soft- ware Deep Sky Stacker with 18 Light frames, 10 Dark frames, 10 Biasframes, 8 Flat frames. Post processing by Microsoft Office. Taken at台灣大雪山賓館 , Tai Chung,Tai Wan.
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