B 33 (LDN 1630) aka (the "Horsehead") Dark Nebula in Orion

Located at: RA 05 hours 41 seconds 02 seconds, Dec -02 degrees 27 minutes 40 seconds

Size: 6.0' x 4.0' Magnitude: -- Class: 4 Ir

North is up

West to the right


 14.5" f5 Newtonian reflector


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


Lumicon Red filter,  840 minutes (84 x 10 minute subs), 02/13/17/19/20/2014; seeing 2.2-6.3 FWHM per CCDStack


CCDStack 2.76.5115.24309, Photoshop CS5.1


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


I had three nights of good seeing, but high clouds and moon, and one night of poor seeing (but clear) and no moon, for this re-shoot.

See the 8" version. See here for a link to my 120 minute 14.5" f5 Newtonian reflector hypered Tech Pan film image of this object.

Description from the on-line Edward Emerson Barnard "A photographic Atlas of Selected Regions of The Milky Way":

Dark Object
α (2000)
5h 40m 53s
δ (2000)
-2 27
Galactic Coordinates
207, -17
Dark mass, diam. 4, on nebulous strip extending S from ? Orionis (see Ap. J., 38, 500, 1913, and Plate XX).