M35 / NGC 2168 w/NGC 2158 (Ron Bokleman)

Celestial hemisphere: Northern · Constellation: Gemini (Gem) · Contains: M 35 · NGC 2158 · NGC 2168

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M35 / NGC 2168 w/NGC 2158

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M35 / NGC 2168 w/NGC 2158

Messier 35 (M35) is a large open star cluster located in the constellation Gemini. The cluster has an apparent magnitude of 5.3 and lies at an approximate distance of 2,800 light years from Earth. It has the designation NGC 2168 in the New General Catalogue.

Messier 35 occupies an area of 28 arc minutes on the sky, which is roughly equal to the size of the full Moon.

Another open cluster, NGC 2158, lies about 15 arc minutes to the southwest of M35 and can be seen in larger amateur telescopes. NGC 2158 has a visual magnitude of 8.6 and occupies an area of 5 arc minutes. It is considerably older, more compact and contains more stars. It is also more than five times more distant than M35 and the two clusters are not physically related.

NOTE: I shot this target before using a SW100EDPro / Canon T5i. This was a test of using the ASI1600MM-C with nearly the same integration time w/AT130EDT. I was going for a more 'natural' sky/star look this time and also trying to control the brighter stars.

I plain ran out of time before hitting my tree line in the West, and didn't get the 240+ CLS(L) channel frames I was looking for. Instead, I extracted the CIE L* from the combined RGB and then added it to the 117/CLS(L) frames before using LRGBCombine to try and boost the L channel a bit.

Original
Final
B

B

Description: CIE L* + L

Uploaded: ...

Cloudy Nights
ZWO ASI1600MM/QHY163M

Open Clusters

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Status	Advanced success
Started	...
Astrometry.net job	1396713
PixInsight job	VEISB1FTFBBO2EUI1D6XA1QF7J09J7YU
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	06h08m39s.594
RA (top/left)	06h11m00s.554
RA (top/right)	06h06m20s.151
RA (bottom/right)	06h06m19s.438
RA (bottom/left)	06h10m58s.110

Dec (center)	+24°17′23″.81
Dec (top/left)	+24°41′08″.49
Dec (top/right)	+24°41′37″.82
Dec (bottom/right)	+23°53′26″.82
Dec (bottom/left)	+23°53′00″.13

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M35 / NGC 2168 w/NGC 2158

M35 / NGC 2168 w/NGC 2158

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Image Index:

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M35 / NGC 2168 w/NGC 2158

M35 / NGC 2168 w/NGC 2158

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