21559+6626
- Unique Name: 21559+6626CLL 17AC
- RA: 21 55 51.66
- Dec: +66 26 17.8
- Discoverer: CLL
- Discoverer Number: 17
- Components: AC
- First year: 1895
- Last year: 2010
- Observations: 4
- First position angle: 238
- Last position angle: 241
- First separation: 39.0
- Last separation: 35.9
- Mag first component: 8.62
- Mag second component: 9.11
- Spectral type:
- Primary proper motion RA: 4
- Primary proper motion DEC: -15
- Secondary proper motion RA: 19
- Secondary proper motion DEC: 13
- Durchmusterung:
- Notes: V