Celestial hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  Checkmark Nebula  ·  HD166996  ·  HD167140  ·  HD167141  ·  HD167166  ·  HD167281  ·  HD167283  ·  HD167332  ·  HD167396  ·  HD167431  ·  HD167452  ·  HD167545  ·  HD167546  ·  HD167593  ·  HD167632  ·  HD167633  ·  HD167655  ·  HD167656  ·  HD167657  ·  HD167697  ·  HD167719  ·  HD167743  ·  HD167744  ·  HD167745  ·  HD167769  ·  HD167791  ·  HD167792  ·  HD167812  ·  HD167838  ·  HD167839  ·  And 143 more.
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M17, Duane Melvin
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M17

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M17, Duane Melvin
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M17

Equipment

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Acquisition details

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Description

12 subs @ 540 Sec    gain = 100    filterless pure color image   
Cherry Springs Astronomy Area, Pennsylvania U.S.A.
(just after the rain)
This was the clearest darkest sky I have yet seen
41 39 42.66 N
77 49 25.84 W

Orion G26 16Bit 26MP cooled to +5C
Filterless pure color image !

Skywatcher 72ED APO doublet refractor   72mm x 420mm
Orion 0.8x flattener/reducer

Orion Starshoot Autoguider TM camera  with 80mm x 300mm refractor guide scope
PHD guiding
Eq6R PRO mount
Polemaster NCP system

Deep Sky Stacker
Pixinsight
PS
Lightroom

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M17, Duane Melvin