Tag Archives: Sharpless 308

Sharpless SH-2 308

19фев

 

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 110 TBM with focal reducer Flt110 w Reducer
Imaging cameras: QSI 683WSG-8 OAG QSI 683
Mounts: Skywatcher NEQ6
Guiding cameras: Orion Starshoot Autoguider Starshoot autoguider
Focal reducers: WILLIAM OPTICS P-FLAT 4 P-Flat 4
Software: Photoshop CS5,  Nebulosity 3.2, Noel Carboni’s Astro Tools for PhotoShop Noel Carboni Actions,  PHD GUIDING,  Nik Software, Inc. Nik Filters,  Sky Safari Pro, iOS Sky Safari Pro
Filters: astrodon 5nm NB filters NarrowBand Filters
Accessories: Kendrick Standard Dual Channel Controller
Resolution: 2775×2199
Dates: Feb. 13, 2015
Frames: 45×900″
Integration: 11.2 hours
Avg. Moon age: 22.98 days
Avg. Moon phase: 41.24%
RA center: 103.595 degrees
DEC center: -23.847 degrees
Pixel scale: 1.742 arcsec/pixel
Orientation: 88.776 degrees
Field radius: 0.856 degrees
Locations: My backyard, Melbourne, Victoria, Australia

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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
Frames:
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

AstroPhotography of the day by SPONLI

19 January 2014

We select the best works of amateur astrophotographers with details of equipment, shooting processing etc.

Sharpless 308: Star Bubble

sharpless308_husted_1658

Image Credit & Copyright: Jeff Husted
Blown by fast winds from a hot, massive star, this cosmic bubble is huge. Cataloged as Sharpless 2-308 it lies some 5,200 light-years away toward the constellation of the Big Dog (Canis Major) and covers slightly more of the sky than a Full Moon. That corresponds to a diameter of 60 light-years at its estimated distance. The massive star that created the bubble, a Wolf-Rayet star, is the bright one near the center of the nebula. Wolf-Rayet stars have over 20 times the mass of the Sun and are thought to be in a brief, pre-supernova phase of massive star evolution. Fast winds from this Wolf-Rayet star create the bubble-shaped nebula as they sweep up slower moving material from an earlier phase of evolution. The windblown nebula has an age of about 70,000 years. Relatively faint emission captured in the expansive image is dominated by the glow of ionized oxygen atoms mapped to violet hues.
NASA APOD 24-dec-13