21125+4552
- Unique Name: 21125+4552ES 1273AB
- RA: 21 12 29.35
- Dec: +45 51 36.2
- Discoverer: ES
- Discoverer Number: 1273
- Components: AB
- First year: 1913
- Last year: 2003
- Observations: 4
- First position angle: 290
- Last position angle: 295
- First separation: 24.0
- Last separation: 23.0
- Mag first component: 7.7
- Mag second component: 13.5
- Spectral type: G5
- Primary proper motion RA: 0
- Primary proper motion DEC: -10
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +45 3446
- Notes: