Click on the image to view it at full resolution, then click again for actual size.
Messier 33, the Triangulum Galaxy, is a face-on spiral galaxy in the constellation Triangulum and the third-largest member of the Local Group after the Milky Way and Andromeda. It lies approximately 2.7 million light-years away, with a true diameter of roughly 60,000 light-years. Unlike the more dramatic M31, M33 has a comparatively low surface brightness, making it more challenging to image well from light-polluted skies despite its relatively large apparent size. Its loosely wound spiral arms host numerous star-forming HII regions, most notably NGC 604, one of the largest known star-forming regions in the Local Group. M33 rewards long, dark-sky exposures that bring out its faint spiral structure and pink-tinged nebular knots.
[Source: Wikipedia, en.wikipedia.org/wiki/Triangulum_Galaxy]
Total image time was 16 minutes.
Messier 33, the Triangulum Galaxy, is a face-on spiral galaxy in the constellation Triangulum and the third-largest member of the Local Group after the Milky Way and Andromeda. It lies approximately 2.7 million light-years away, with a true diameter of roughly 60,000 light-years. Unlike the more dramatic M31, M33 has a comparatively low surface brightness, making it more challenging to image well from light-polluted skies despite its relatively large apparent size. Its loosely wound spiral arms host numerous star-forming HII regions, most notably NGC 604, one of the largest known star-forming regions in the Local Group. M33 rewards long, dark-sky exposures that bring out its faint spiral structure and pink-tinged nebular knots.
[Source: Wikipedia, en.wikipedia.org/wiki/Triangulum_Galaxy]
Total image time was 16 minutes.
| Moon Phase | First Quarter | ||||||
| Camera | Seestar S50 Pro (4K Sony IMX585 sensor) | ||||||
| Optics | 260 mm focal length, f/5.2, 50 mm aperture | ||||||
| Filter | LP | ||||||
| Binning | 1x1 | ||||||
| Date | 2026-09-18 | ||||||
| PixInsight Processing |
|
