Tag Archives: NGC 6888

Crescent Nebula

The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away. It was discovered by Friedrich Wilhelm Herschel in 1792.^[2] It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000^[3] to 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.

Imaging telescopes or lenses: Borg 125ED
Imaging cameras: Canon 600D
Mounts: Celestron Advanced VX
Guiding telescopes or lenses: Borg Mini-50
Guiding cameras: SBIG SG-4
Software: Adobe Photoshop 6 CS, Stark Labs Nebulosity
Filters: Astronomik UHC, Baader Ha
Resolution: 2452×1589
Dates: Oct. 18, 2014, Oct. 19, 2014
Locations: Home
Frames:
Baader Ha: 16×300″ ISO800 bin 1×1
Astronomik UHC: 28×180″ ISO800
Integration: 2.7 hours
Darks: ~50
Avg. Moon age: 24.55 days
Avg. Moon phase: 25.68%
Mean SQM: 18.41
Temperature: 18.00
RA center: 303.165 degrees
DEC center: 38.480 degrees
Orientation: -92.125 degrees
Field radius: 0.903 degrees

Автор: Chris Bernardi

Astrophotography of the day of SPONLI, 30.10.2014

Crescent Nebula

The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away. It was discovered by Friedrich Wilhelm Herschel in 1792.It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.

It is a rather faint object located about 2 degrees SW of Sadr. For most telescopes it requires a UHC or OIII filter to see. Under favorable circumstances a telescope as small as 8cm (with filter) can see its nebulosity. Larger telescopes (20cm or more) reveal the crescent or aEuro sign shape which makes some to call it the “Euro sign nebula”.

Imaging telescopes or lenses: Celestron C14 EDGE HD
Imaging cameras: SBIG STL-11000M Class 2
Mounts: RAINBOWASTRO RST400
Guiding cameras: SBIG ST-i Mono
Filters: Astrodon OIII 3nm, Astrodon Ha 3nm
Resolution: 1600×1061
Dates: Oct. 6, 2014
Locations: RainbowAstro observaroty
Frames: 11×1200″
Integration: 3.7 hours
Avg. Moon age: 11.99 days
Avg. Moon phase: 91.53%
RA center: 303.042 degrees
DEC center: 38.333 degrees
Pixel scale: 1.176 arcsec/pixel
Orientation: 90.498 degrees
Field radius: 0.313 degrees

Автор: ByoungJun Jeong

AstroPhotography of the day of SPONLI, 18.10.2014

NGC 6888, Crescent Nebula

The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away. It was discovered by Friedrich Wilhelm Herschel in 1792. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.

It is a rather faint object located about 2 degrees SW of Sadr. For most telescopes it requires a UHC or OIII filter to see. Under favorable circumstances a telescope as small as 8cm (with filter) can see its nebulosity. Larger telescopes (20cm or more) reveal the crescent or a Euro sign shape which makes some to call it the “Euro sign nebula”.

Imaging telescopes or lenses: Takahashi TSA-102
Imaging cameras: Atik 383L+ mono
Mounts: SkyWatcher NEQ6 pro II
Guiding telescopes or lenses: EZG60
Guiding cameras: QHYCCD QHY5 Mono
Focal reducers: Takahashi TOA-35
Software: Pleiades Astrophoto, S.L. PixInsinght 1.8 RC7
Filters: Baader Planetarium OIII, Baader Planetarium Ha 7nm 2″
Dates: Aug. 15, 2014, Aug. 16, 2014
Locations: Pantano
Frames:
Baader Planetarium Ha 7nm 2″: 69×600″ -20C bin 1×1
Baader Planetarium OIII: 66×600″ -20C bin 1×1
Integration: 22.5 hours
Darks: ~20
Flats: ~16
Bias: ~20

Author: Jose Luis Ricote
AstroPhotography of the day by SPONLI 31 Aug 2014

NGC 6888: the Crescent Nebula

The Crescent Nebula (also known as NGC 6888, Caldwell 27, Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light years away. It was discovered by Friedrich Wilhelm Herschel in 1792.It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.

Imaging telescopes or lenses: CELESTRON Edge HD 8
Imaging cameras: QSI 583 wsg
Mounts: Astro-Physics Mach 1 GTO
Guiding telescopes or lenses: CELESTRON Edge HD 8
Guiding cameras: SX Lodestar
Software: Maxim DL 5 MaximDL 5, Pleiades Astrophoto Pixinsight 1.8, Adobe Photoshop 6 CS
Filters: Astrodon Ha 5mm, Astrodon OIII 3nm
Accessories: SXV-AO-LF
Frames: 36×1800″

Autor: Daniele Malleo

AstroPhotography of the day by SPONLI

22 January 2014

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

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