Sh2-273 (LBN 911, aka "Cone Nebula") Bright Nebula surrounds Dark Nebula in Monoceros

Located at: RA 06 hours 41 minutes 12 seconds; Dec +09 degrees 22 minutes 23 seconds

Size: ~ 6.0' x 2.6' Magnitude: -- Class: Emission (Sharpless) 3 2 3

North is up

West to the right


 8" f5 Newtonian reflector


  ST-8XME, self-guided, binned 1x1, temp -20c, camera control MaxIm DL 4.56


Red (Hoya 25A) filter, 290 minutes (29 x 10 minute subs), 03/15/16/2007


CCDStack 1.1, Photoshop 7.0


 Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s)


The 'Cone Nebula' is this little finger of dark nebulosity in a small southeastern part of the much larger object known as Sh2-273 (LBN 911). Sh2-273 is approximately 140' in size and irregularly shaped, and contains the open cluster NGC 2264, also known as the 'Christmas Tree' cluster. This image replaces a 122 minute red-filtered Track & Accumulate image from 03/19/2006. See the 14.5" version.