Object: Constellation: Coordinates: Size: Brightness:
Barnard 33 Ori 05h41m / -0228' 8' x 6' -
IC 434 Ori 05h41m / -0230' 1 30' x 30' 7.3mag

The reddish glowing emission nebula IC 434 (IC = Index Catalogue, an update to the NGC catalogue) and the dark cloud Barnard 33 (the black silhouette resembling a horse's head) in the constellation Orion on November 15 / 16, 2015. The dark cloud Barnard 33 (also called "Horsehead nebula") contains cold (-260 C to -170 C) molecular hydrogen and traces of hydrocarbons, oxygen and sulfur. The emission nebula IC 434 is a hot (several thousand degrees Celsius) HII region. IC 434 and B33 are 1500 light years from earth and were discovered on photographs by Williamina Flemming in 1887. (source: Wikipedia)

Twenty-one exposures of approximately 3 minutes at ISO 800 with no dark frame subtraction were stacked with Deep Sky Stacker (resulting in a 1 h 09 min exposure) and further processed in Photoshop.
Equipment: Canon EOS 450D Baader modified camera, TeleVue Paracorr Type II coma corrector, 16" f/4.5 "Ninja" dobsonian telescope riding on a dual-axis Tom Osypowski equatorial platform, Lacerta MGEN autoguider, Lacerta off axis system (field of view comparison: image of the moon with the same equipment).

Search chart for IC 434 and Barnard 33. Map © 2015 "The Mag-7 Star Atlas Project", www.siaris.net. Map is modified. The map can be downloaded here .