NGC 2264 - The Cone Nebula & The Christmas Tree Cluster (Timothy Martin)

Celestial hemisphere: Northern · Constellation: Monoceros (Mon) · Contains: 15 S Mon · B39 · Christmas Tree Cluster · Hubble's variable neb · NGC 2259 · NGC 2261 · NGC 2264 · PK201+02.1 · Sh2-273 · The star 15Mon

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NGC 2264 - The Cone Nebula & The Christmas Tree Cluster

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NGC 2264 - The Cone Nebula & The Christmas Tree Cluster

Here’s the wide-angle shot of the Christmas Tree Cluster and the Cone Nebula, NGC 2264. NGC 2261, Hubble’s Variable Nebula, is visible as the yellow comet-like object in the lower right corner of the picture. William Herschel, who discovered it in 1783, thought it was indeed a comet. It’s not. It’s a relatively small reflection nebula about three light years long, 2,500 light years away. In 1916, Edwin Hubble discovered its variability in brightness, hence the name. That variability is caused by dark, dusty matter orbiting the primary illuminating star, R Monocerotis.

Located 2,700 light years away in the Monoceros constellation, NGC 2264 is yet another star-forming region, and the underlying emission nebula is what gave birth to the stars in the cluster, which are called “snowflakes” because they remain close to their source.

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Status	Advanced success
Started	...
Astrometry.net job	4153473
PixInsight job	324F9Z1NA4WNSOJ0YOPYXO8BNTKK1XKP
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	06h41m10s.48
RA (top/left)	06h44m31s.77
RA (top/right)	06h36m40s.90
RA (bottom/right)	06h37m50s.97
RA (bottom/left)	06h45m37s.77

Dec (center)	+09°49′42″.5
Dec (top/left)	+11°20′08″.7
Dec (top/right)	+11°08′40″.5
Dec (bottom/right)	+08°19′03″.3
Dec (bottom/left)	+08°30′27″.3

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NGC 2264 - The Cone Nebula & The Christmas Tree Cluster

NGC 2264 - The Cone Nebula & The Christmas Tree Cluster

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NGC 2264 - The Cone Nebula & The Christmas Tree Cluster

NGC 2264 - The Cone Nebula & The Christmas Tree Cluster

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