ScienceDownEast | ScienceDownEast Astrophotography | Nebulae | NGC 6888 | NGC 6888 The Crescent Nebula
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The Crescent Nebula is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It was discovered by William Herschel in 1792. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 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. - Wikipedia
Blair noted that the Soap Bubble Nebula, Ju 1 (also known as PN G075.5+01.7) planetary nebula is above and to the left of the Crescent Nebula nearer the top of the image in this orientation.
| Exposure | 10@1200 sec (3.3) | ||||||||
| ISO | 3200 | ||||||||
| Camera | Nikon Z7 [8856 x 5504] | ||||||||
| Optics | Skywatcher Esprit 120mm Refractor, 840 mm focal length | ||||||||
| Filter | Optolong L-eNhance | ||||||||
| Guiding | KStars Internal guiding using a ZWO 224MC on an Orion 60x240mm Guide scope | ||||||||
| Controller | Images taken using Kstars on an Mele Quieter 3C under Unbuntu 24.04.3 | ||||||||
| Location | Lower Sackville, Nova Scotia. | ||||||||
| Date | 2024-10-22 | ||||||||
| PixInsight Processing |
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