|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).