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NGC 2264 Cone Nebula in the Hubble Palette, 


            Douglas J Struble
NGC 2264 Cone Nebula in the Hubble Palette

NGC 2264 Cone Nebula in the Hubble Palette

Technical card

Resolution: 3333x4168

Dates:Dec. 28, 2017Jan. 4, 2018Jan. 5, 2018

Astrodon Ha 5nm: 107x240" (gain: 139.00) -20C bin 1x1
Astrodon OIII 3nm: 70x240" (gain: 139.00) -20C bin 1x1
Astrodon SII 3nm: 73x240" (gain: 139.00) -20C bin 1x1

Integration: 16.7 hours

Darks: ~50

Flats: ~50

Bias: ~250

Avg. Moon age: 15.23 days

Avg. Moon phase: 82.66%

Bortle Dark-Sky Scale: 6.00 job: 1879438

RA center: 100.310 degrees

DEC center: 9.453 degrees

Pixel scale: 0.650 arcsec/pixel

Orientation: 3.359 degrees

Field radius: 0.481 degrees

Locations: Backyard Red Zone Observatory, Taylor, MI, Michigan, United States

Data source: Backyard


Wasn't very much OIII in this nebula; mostly just Ha and SII.

The Cone Nebula is an H II region in the constellation of Monoceros. It was discovered by William Herschel on December 26, 1785, at which time he designated it H V.27. The nebula is located about 830 parsecs or 2,700 light-years away from Earth. The Cone Nebula forms part of the nebulosity surrounding the Christmas Tree Cluster. The designation of NGC 2264 in the New General Catalogue refers to both objects and not the nebula alone.

The diffuse Cone Nebula, so named because of its apparent shape, lies in the southern part of NGC 2264, the northern part being the magnitude-3.9 Christmas Tree Cluster. It is in the northern part of Monoceros, just north of the midpoint of a line from Procyon to Betelgeuse.

The cone's shape comes from a dark absorption nebula consisting of cold molecular hydrogen and dust in front of a faint emission nebula containing hydrogen ionized by S Monocerotis, the brightest star of NGC 2264. The faint nebula is approximately seven light-years long (with an apparent length of 10 arcminutes), and is 2,700 light-years away from Earth.



Douglas J Struble
License: None (All rights reserved)

Sky plot

Sky plot


NGC 2264 Cone Nebula in the Hubble Palette, 


            Douglas J Struble