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 The HorseHead Nebula 

Zoom On B33
HH Object

Sculpted by stellar winds and radiation, a magnificent interstellar dust cloud by chance has assumed this recognizable shape. Fittingly named the Horsehead Nebula, it is some 1,500 light-years distant, embedded in the vast Orion cloud complex. About five light-years "tall", the dark cloud is cataloged as Barnard 33 and is visible only because its obscuring dust is silhouetted against the glowing red emission nebula IC 434. Stars are forming within the dark cloud. Contrasting blue reflection nebula NGC 2023, surrounding a hot, young star, is at the lower left. [Text adapted from APOD]

Pubblications "Nuovo Orione" Year 2013 Calendar
Optics: GSO RC 10" F8 2000mm - Astrograph Ritchie-Chrétien
Mount: AP Mach1 GTO on Gemini Q-Lock tripod
Camera: ATIK 4000LE with SX USB Filter Wheel
Filters: Baader LRGB 2"
Guiding Systems: SXV-AO-LF Active Optics - SX Lodestar
Dates/Times: September/October/December 2011 - Febbruary 2012
Location: Pragelato (TO) - Italy
Exposure Details: L:R:G:B => 480:110:90:80 = > (32x15):(11x10):(9x10):(8x10) colore bin2 [num x minutes]
Cooling Details: -20°C
Acquisition: Maxim DL/CCD, Perseus
Processing: CCDStack2+, PS CS5, PixInsight
Mean FWHM: 2.33" / 3.18"
SQM-L: 20.58 / 21.02