The Christmas Tree Cluster
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My last capture of the year 2024 is the Christmas Tree Cluster and Cone Nebula in the constellation Monoceros. This region is a fantastic sight in the night sky, with the Cone Nebula and the Christmas Tree Cluster forming the iconic structure in the center. While not officially part of this designation, the Fox Fur Nebula and the Snowflage also are prominent parts of this region.
The Cone Nebula is an H-II region. It's shape is created by a dark absorption nebula and dust in front of the faint emission nebula.
Left from the central structure, there's a small bright nebula, easy to miss. This is Hubble's Variable Nebula, named after Edwin Hubble, who studied it in the early 20th century - the first recorded observation however was done by William Herschel in 1783. The nebula is illuminated by the star R Monocerotis, which is a young variable star, and changes it's appearance visibly over just weeks.
Finally, below the central structure and right from those dark nebulae, there's NGC 2259, an open star cluster.
Scope: Askar 103APO
Lens: Askar 0.6x Reducer
Camera: Canon EOS 6Da
Filter: Antlia TriBand RGB Ultra
Mount: Skywatcher AZ-EQ5 GT
Guiding: Svbony SV165 Guide Scope with ZWO ASI 224MC
Controller: ZWO ASIAir Pro
Integration time: 6hrs 50min
Full version and print available at:
https://adfr.io/astro/20241228_ngc2264
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