| Image Name: | NGC 3972, 3977, 3992, 3990, 3998 in Ursa Major | | Constellation: | Ursa Major | | Image Date: | 2025-05-31 | | Optics: | Astro-Tech AT115EDT Refractor | | Lenses: | Astro-Tech Flattener / Reducer 0.80 | | Camera: | ZWO ASI294MM PRO IMX492 | | Focal Ratio: | F/5.63 | | Focal Length: | 644mm | | ArcSec/Pixel: | 1.47 | | Exposures: | 1x300s 2x180s | | Mount: | G11T | | Guided: | Yes | | Bortle Sky: | 3 | | Labeled Image: | Annotated View | | Posted by: | ozarkastro | | Views: | 49 |
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