16566+5711
- Unique Name: 16566+5711A 1143CD
- RA: 16 56 35.49
- Dec: +57 12 56.9
- Discoverer: A
- Discoverer Number: 1143
- Components: CD
- First year: 1905
- Last year: 2010
- Observations: 22
- First position angle: 148
- Last position angle: 140
- First separation: 0.8
- Last separation: 0.7
- Mag first component: 10.72
- Mag second component: 10.85
- Spectral type: K5
- Primary proper motion RA: -12
- Primary proper motion DEC: 30
- Secondary proper motion RA: -12
- Secondary proper motion DEC: 30
- Durchmusterung: +57 1717
- Notes: N
