21125+3834
- Unique Name: 21125+3834SEI1445
- RA: 21 12 29.51
- Dec: +38 33 59.4
- Discoverer: SEI
- Discoverer Number: 1445
- Components:
- First year: 1895
- Last year: 2002
- Observations: 7
- First position angle: 23
- Last position angle: 23
- First separation: 27.9
- Last separation: 28.1
- Mag first component: 7.2
- Mag second component: 10.5
- Spectral type: B9
- Primary proper motion RA: 1
- Primary proper motion DEC: -4
- Secondary proper motion RA: 0
- Secondary proper motion DEC: -5
- Durchmusterung: +37 4222
- Notes: