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  •  Travel News - September 25, 2022
    2022年09月25日
    Travel News - September 25, 2022

    September 25, 2022, Alberta, Canada: This is the field in Vulpecula the Fox that contains the famous planetary nebula, the Dumbbell Nebula aka Messier 27, at left, but also the faint emission nebulas NGC 6820 at right and Sharpless 2-88 above it. The small star cluster below centre is NGC 6830. A small star cluster, NGC 6823, lies embedded in NGC 6820. The field is yellowed by the interstellar dust reddening distant objects...This is a blend of filtered and unfiltered stacks: 18 x 6-minutes at ISO 2500 through the IDAS NB1 dual narrowband filter, and 16 x 3-minutes at ISO 1000 with no filter, all through the SharpStar 61 EDPHII apo refractor at f/4.6 with its reducer/flattener, and with the red-sensitive Canon Ra, all on the Star Adventurer GTi mount/tracker, autoguided with the Lacerta MGENIII autoguider, taken as part of testing the mount. No darks or LENR applied here, but the autoguider applied some dithering offset between each frame, to cancel out thermal noise hot pixels when the sub-frames were ali...

    商品コード: 2022111610825

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