Sharpless 308 in Canis Major

5fbb1380c39acdf19e3554509cd417d3.1824x0_q100_watermark_watermark_opacity-20_watermark_position-4_watermark_text-Copyright Stefan Westphal
Sharpless 308 (also known as Sh2-308, S 308 or RCW 11) is a cosmic bubble of nearly 60 light-years across, located some 5,200 light-years from Earth in the constellation of Canis Major, the Greater Dog. Known as a Wolf-Rayet bubble, it has an age of about 70,000 years and an expansion velocity of about 60 kilometers per second.

Imaging telescopes or lenses: William Optics FLT 132/925
Imaging cameras: Artemis Atik 383L+
Mounts: 10 Micron GM2000 QCI
Guiding telescopes or lenses: William Optics 80 II ed triplet APO
Guiding cameras: M-Gen Guiding Kamera
Focal reducers: Tele Vue 0.8x Focal Reducer
Software: Deep Sky Stacker 3.3.3 Beta 51 DSS DeepSkyStacker, Fitswork4, Adobe Photoshop CS2
Filters: Baader Planetarium 36mm Luminance, Baader Planetarium 36mm Red, Baader Planetarium 36mm Green, Baader Planetarium 36mm Blue
Accessories: Lacerta MGEN2
Dates: Dec. 5, 2013
Locations: Sahara Sky, Marokko
Baader Planetarium 36mm Blue: 6×600″ -20C bin 1×1
Baader Planetarium 36mm Green: 5×600″ -20C bin 1×1
Baader Planetarium 36mm Luminance: 8×600″ -20C bin 1×1
Baader Planetarium 36mm Red: 5×600″ -20C bin 1×1
Integration: 4.0 hours
Darks: ~14
Flats: ~27

Autor: Stefan Westphal

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19 January 2014

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