Spider Nebula
IC 417, known as the Spider Nebula, is an emission nebula located in the constellation Auriga, roughly 7,100–10,000 light-years from Earth. Spanning about 13 by 10 arcminutes, it is part of the Aur OB2 association on the near side of the Perseus Arm of our galaxy. This active star-forming region contains the young open cluster Stock 8, whose massive stars ionize surrounding hydrogen gas, creating the nebula’s vivid glow. Its intricate, web-like filaments of gas and dust make IC 417 a striking example of stellar birth and evolution in the Milky Way (Wiki +).
![]() |
| IC 417 - Jan 21, 2026 GT102/ASI533mc/TriBand filter 54x300 sec subs |
This image was an effort on my part to test the new Antlia Triband RGB Ultra filter for use on my EdgeHD11 in Hyperstar configuration. But alas, I ordered the wrong bracket for my ZWO EAF and so I decided to try it out on my GT102 instead. The filter is basically a light pollution filter, with transmission bands that are much wider than typical NB filters and centered on the Ha, O3, S2 and N2 lines with a band also in the deep blue spectrum. It supposedly can produce some reasonable SHO images with the proper processing techniques. And, according to Starzona (where I purchased the filter) it can handle the f/2 fast optics of the Hyperstar.
Medusa Nebula
The Medusa Nebula (Sh2-274), also known as Abell 21, is a striking planetary nebula located about 1,500 light-years away in the constellation Gemini. Spanning roughly 4 light-years across, its delicate, serpentine filaments of glowing gas inspired its name, recalling the snake-haired Gorgon from Greek mythology. Formed when a dying red giant shed its outer layers, the nebula’s intricate structure is illuminated by the ultraviolet radiation of its hot central star, now transitioning toward a white dwarf. This ethereal remnant offers a glimpse into the final stages of stellar evolution and the beauty of cosmic transformation.
![]() |
| Sh2-274 - Jan 21, 2026 GT102/ASI533mc/TriBand filter 46x300 sec subs |
This is my second DSO imaged with my new Altlia Triband RGB Ultra filter. Some of the takeaways on this as well as on IC 417 - the Spider Nebula is the need for more integration time and probably longer exposures (600sec vs 300sec). The dynamic range just isn’t quite there! And, of course, the details are minimal in the interior of the nebula unlike the much better resolution achieved with my EdgeHD11 (Abell 21, Sh2-274: The Medusa Nebula. A Michael/Uwe teamwork - AstroBin ). Lots more experimenting to do.
Blue Snowball
NGC 7662, known as the Blue Snowball Nebula, is a striking planetary nebula about 2,000 light-years away in the constellation Andromeda. Its vivid blue hue comes from ionized oxygen gas illuminated by the intense ultraviolet radiation of its central white dwarf star. Measuring roughly 0.5 arcminutes across and shining at an apparent magnitude of about 8.6, this nebula represents the final evolutionary stage of a Sun-like star, showcasing intricate shells of gas expanding into space.
![]() |
| NGC 7662 - Sept and Nov 2025 EdgeHD-11/ASI2600mm LRGBHaO3 - 5 hrs integration time |
This was a real challenge to process and keep the core from being blown out. While processing this DSO I uncovered some flaws in some of my existing processing steps which I’ve corrected - and added the newer tools such as MAS to my new processes.





What to look for: • The Moon and Saturn will be easy to spot with the naked eye