20125+5128
- Unique Name: 20125+5128AC 17AB
- RA: 20 12 31.73
- Dec: +51 27 49.0
- Discoverer: AC
- Discoverer Number: 17
- Components: AB
- First year: 1859
- Last year: 2008
- Observations: 12
- First position angle: 80
- Last position angle: 83
- First separation: 3.9
- Last separation: 4.3
- Mag first component: 6.17
- Mag second component: 10.55
- Spectral type: K2.5III
- Primary proper motion RA: -13
- Primary proper motion DEC: -16
- Secondary proper motion RA: -15
- Secondary proper motion DEC: -15
- Durchmusterung: +51 2796
- Notes: