NGC 2264 - 2019 (Gary Imm)

Celestial hemisphere: Northern · Constellation: Monoceros (Mon) · Contains: 15 S Mon · Christmas Tree cluster · Cone nebula · NGC 2264 · Sh2-273 · The star 15Mon

NGC 2264 - 2019

This image contains a series of objects located 2500 light years away in the constellation of Monoceros. I have included an annotated image to assist in the description below. The primary objects in the image, from left to right, are the Cone Nebula, the Christmas Tree Cluster (NGC 2264), the bright multiple star system S Monocerotis, and the Fox Fur Nebula. Also, 8 Herbig-Haro objects are identified in the image.

What about Sh2-273? Sh2-273 is a broad emission nebula about 4 degrees wide. There is much confusion over the Sh2-273 designation. I have seen it assigned to many different things, including the Cone Nebula and the HII emission arc at the top right of the image. But this entire image is just a subset of the large Sh2-273 nebula.

The most spectacular object in the image is the Cone Nebula. Similar to the Pillars of Creation, the Cone Nebula is a 7-light-year-long gaseous star formation pillar silhouetted against glowing red gas. I am surprised that I could find no official designation for this object.

The Christmas Tree Cluster (NGC 2264) is an open star cluster of 600 blue young stars ionizing the reddish hydrogen nebula. The NGC 2264 designation includes both the star cluster and the nebula. In the image, the "tree" points down and to the left.

The image also contains many objects which do not have an official designation, including blue and yellow reflection nebulae, twisting dark lanes, and deep reddish emission nebulae. I think that this area is one of the most interesting and beautiful areas of the sky.

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Description: Annotated

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ZWO ASI1600MM/QHY163M
Open Star Clusters
The refractors!
Cloudy Nights

Open Clusters

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Status	Advanced success
Started	...
Astrometry.net job	2479359
PixInsight job	OXCWYLH1BW22JAYUHSRS4MDGTX17NVQS
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	06h41m02s.183
RA (top/left)	06h43m16s.650
RA (top/right)	06h41m03s.820
RA (bottom/right)	06h38m48s.183
RA (bottom/left)	06h41m01s.413

Dec (center)	+09°49′31″.42
Dec (top/left)	+09°38′40″.74
Dec (top/right)	+10°24′14″.38
Dec (bottom/right)	+10°00′20″.79
Dec (bottom/left)	+09°14′47″.32

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NGC 2264 - 2019

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