The Crescent Nebula is an object worth coming back to year after year, and I’m much happier with this year’s version than any other. The improvement is due to better collimation of my AstroTech AT8RC, thanks to TS Optics TSRCKOLLI (review soon), as well as dedicating a lot of time to the OIII channel. I … More NGC6888, The Crescent Nebula
Finally, some color images! (Or at least false color.) This is one panel from my earlier Crescent Nebula 4-panel H-alpha mosaic, with OIII and SII data added. The first version is in a slightly modified “Hubble” narrowband palette (R=70% SII+30% H-alpha, G=100% H-alpha, B=100% OIII). Image data: Exposures: 13 x 1200s Ha, 16 x 1200s … More NGC 6888 Narrowband (plus some PixelMath)
This is a portion of a larger H-alpha mosaic that I took while the full moon was out this past week. NGC 6888 is a terrific target for a close-up, but it’s also beautiful in context of the whole “neck” of the swan Cygnus. Image data: Exposures: Portion of a four-frame mosaic composed of 63 … More Lonely little NGC 6888 adrift in a sea of ionized Hydrogen.