21125+3217
- Unique Name: 21125+3217SEI1443
- RA: 21 12 30.65
- Dec: +32 17 28.8
- Discoverer: SEI
- Discoverer Number: 1443
- Components:
- First year: 1894
- Last year: 2004
- Observations: 7
- First position angle: 140
- Last position angle: 140
- First separation: 25.5
- Last separation: 25.5
- Mag first component: 10.36
- Mag second component: 11.48
- Spectral type: F5
- Primary proper motion RA: 21
- Primary proper motion DEC: 31
- Secondary proper motion RA: 22
- Secondary proper motion DEC: 31
- Durchmusterung: +31 4376
- Notes: