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.
Since the weather isn’t cooperating enough for me to capture more images of NGC 7000, let’s use the H-alpha channel image to show a few ways to create contrast in otherwise “flat” looking nebula images. Here is the image basically right out of calibration, with only a single quick curve applied to stretch it a … More Tutorial – Creating contrast in nebula images
If Cygnus would stay in the sky all year, I don’t know if I could exhaust all of its imaging possibilities. This is the Western Veil Nebula, NGC 6960 and Pickering’s Triangle (bottom left). Both are remnants of a supernova from about 5,000 years ago that also includes the beautiful NGC 6888 (not shown) among … More The Western Veil Nebula and Pickering’s Triangle
The constellation Cygnus is awash in nebulosity. Point your telescope almost anywhere in the constellation and you’ll find something. The usual suspects are the North America Nebula (NGC 7000), the Crescent Nebula (NGC 6888), and all of the pieces of the Veil Nebula. But right at the heart of the constellation, at the center of … More IC1318, The Butterfly Gamma Cygni Nebula