Saturn (North up) Seeing: 4/5 Capture details: Date: 20200715 14:55 (UTC) Telescope: Celestron C8-A XLT FocalLength: ~4000mm (2X Powermate) Mount: Rainbowastro RST-135 Camera: QHYCCD QHY224C + QHY290M with ADC Exposure: 3mins RGB (1min each) + 9mins L (1min each); stacked 70% Processed: AS, RS, WinJUPOS, PS
NGC 7009 Saturn Nebula 在大家追彗星的同時試下觀察一下另類星體 Saturn Nebula是一個行星狀星雲 (planetary nebula), 中心是一顆視星等11.5等的白矮星, 因為外型似土星, 所以有土星星雲之稱 Capture details: Date: 20200718 Telescope: Celestron C8-A XLT FocalLength: ~4000mm (2X Powermate) Mount: Rainbowastro RST-135 Camera: QHYCCD QHY290M Exposure: 3sec * 60frames stacked 80% Processed: AS, PS
M15球狀星團 尋晚睇星順手影左1分鐘exposure. 因為睇星關係無對好極軸，又用左cheap雞focal reducer, 星點唔太圓 Capture details: Date: 20200619 Telescope: Celestron C8-A XLT FocalLength: ~1260mm (0.63X reducer) Mount: Rainbowastro RST-135 Camera: QHYCCD QHY290m Exposure: 0.5s x 120 (total integration 1min) Processed: DSS, PI, PS
所以喜歡天文嘅朋友都歡迎加入討論 嚟緊如果疫情好轉，夏季會同一班天文同好搞市區roadshow，提供大型支望遠鏡比市民觀星✨
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