NGC 4157 1.3X crop
Arp 18 1.3X crop| 0bject | NGC 4157 and Arp 18 (NGC 4088) Galaxies in Ursa Major |
| Date | February 15-16, 2021 |
| Exposure | LRGB 140:50:50:50 (4.8 hours, cropped) |
| Camera | STL11000M with AstroDon Gen II filters |
| Telescope | ASA 10N f/3.7 on AP900GTO CP3 |
| Guiding | Remote guide head with MiniBorg 50 mm |
| Processing | MaximDL, Photoshop CS6, Astronomy Tools, Topaz Denoise AI |
| Comments | Good seeing; acquired with CCD Commander from Animas, NM |