Deep Sky Object in Winter
NGC2264 & Cone Nebula (Open Cluster in Monoceros)

Date & Time: Dec 14 2007, from 22:29 to 24:51 JST(+0900)
Composed 6shots with 10 minutes exposed
Optical: TAKAHASHI 12.5cm(4.9") fluorite refractor with a conversion lens (f=700mm, F5.6)
with IDAS LPS-P2-FF Light-pollution suppression filter
Auto-guided with VIXEN ATLUX Equatorial
Digital Camera: Nikon D80 (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording format...12bit CCD-RAW, converted to 16bit TIFF(3872×2592)
CCD Sensitivity...ISO1600

NGC2264 / Diffused Nebula & Open Cluster, type 1 E
R.A.06h 41m 6.0s (2000.0)
Dec.+09° 53' 00" (2000.0)
Apparent Size60'
Real Size45 light yrs.
Distance2600 light yrs.
Other IDsSh2-273, LBN911
This picture shows you a very distributed open cluster and surrounding nebulosities about 6 degrees north of the Rosette Nebula in Monoceros. A bright bluish star in upper part is a variable of S Mon, changing from 4.2 to 4.6 in magnitude. The cluster of NGC2264 is formed from fine stars lying south of S Mon. You can see a bluish reflection nebula just southwest of the variable, and a very very dimmed reddish diffused nebula in the southward. The diffused nebula has a dark cut in southern region; this characteristic structure has given the nebula a nickname of "The Cone Nebula" or "The Christmas Tree", etc. Furthermore, a very gigantic star field including this picture is occupied by pale and reddish nebulosities. The hydrogen gaseous region has a number of NGC2264, same as the open cluster in this image.

→Jump to Close-up of NGC2264 (94KB)

Hubble's Variable Nebula(NGC2261)


Copyright(c) 2007 by Naoyuki Kurita, All rights reserved.
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