Barnard's Galaxy aka Caldwell 57 aka NGC 6822 in Sagittarius (Scott Stirling)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: Barnard's Galaxy · NGC 6822

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Barnard's Galaxy aka Caldwell 57 aka NGC 6822 in Sagittarius

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Barnard's Galaxy aka Caldwell 57 aka NGC 6822 in Sagittarius

This is a tough target, definitely some IFN in the field of view making it noisier. It was a challenge getting nice colors out of the main target galaxy. It is as if seen through a fine veil of integrated flux nebula and dust. LBN 83 (northwest in the annotated view) may be misplaced because there is no bright nebula in the annotated location. NOTE: over time I have noticed that many of the Lynd catalog items are systematically incorrect, as if offset by some regular error from coordinates in other catalogs of the same objects.

Acquisition data
L = 26 x 1200s
R = 24 x 300s
G = 17 x 300s
B = 20 x 300s
H = 4 x 1800s

This is a target that I would see listed in catalogs but never could see what it was actually until getting this data from dark skies in Chile and a Planewave 17K scope there. It is an interesting target, a local galaxy visible near the galactic plane in Sagittarius.

According to Stephen O'Meara in "The Caldwell Objects," Edward Barnard discovered this object in a five inch refractor in 1884, and believed it to be a nebula in the Milky Way. Barnard died in 1923, just one year before Hubble used his 100 inch refractor to find Cepheid variable stars within it, which showed, as in Andromeda, that it was in fact a separate galaxctic body outside our own.

Astroimaging from Chile
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Deep Sky West: Planewave CDK 17 & FLI ML16200

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Status	Advanced success
Started	...
Astrometry.net job	9278921
PixInsight job	SDQ0AFP1ZZTKWVUUVQIGXJH48C6KL02W
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	19h44m49s.860
RA (top/left)	19h46m00s.656
RA (top/right)	19h43m09s.548
RA (bottom/right)	19h43m38s.849
RA (bottom/left)	19h46m30s.379

Dec (center)	-14°45′04″.53
Dec (top/left)	-14°21′23″.75
Dec (top/right)	-14°28′48″.11
Dec (bottom/right)	-15°08′43″.20
Dec (bottom/left)	-15°01′20″.41

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Barnard's Galaxy aka Caldwell 57 aka NGC 6822 in Sagittarius

Barnard's Galaxy aka Caldwell 57 aka NGC 6822 in Sagittarius

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Barnard's Galaxy aka Caldwell 57 aka NGC 6822 in Sagittarius

Barnard's Galaxy aka Caldwell 57 aka NGC 6822 in Sagittarius

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