Something to image in the strong moonlight. Mizar (Zeta Ursae Majoris) has 2 partners: the brighter one you can see is 14 arcsecs away at mag 4 but there’s also one at 0.04 arcsecs separation and mag. 2 that we can’t see separately. Alcor is a binary too with an 8th magnitude red dwarf companion, 1 arcsec away from the primary.
| Object ID | Mizar, Alcor |
| Details | 2020-04-06 21:03:20UT |
| Telescope | 250mm f4.8 Newtonian |
| Camera | Atik 460EX @-15C Baader RGB filters |
| Exposure(s) | 3x30s ea RGB 1×1 |
| Capture | APT |
| Processing | APP, Photoshop |