20125+5128
- Unique Name: 20125+5128AC 17AC
- RA: 20 12 31.73
- Dec: +51 27 49.0
- Discoverer: AC
- Discoverer Number: 17
- Components: AC
- First year: 1913
- Last year: 2003
- Observations: 4
- First position angle: 8
- Last position angle: 8
- First separation: 83.2
- Last separation: 84.9
- Mag first component: 6.17
- Mag second component: 12.8
- Spectral type: K2.5III
- Primary proper motion RA: -15
- Primary proper motion DEC: -15
- Secondary proper motion RA: 1
- Secondary proper motion DEC: -4
- Durchmusterung:
- Notes: