21345+4725
- Unique Name: 21345+4725ES 1172AB
- RA: 21 34 25.29
- Dec: +47 25 12.7
- Discoverer: ES
- Discoverer Number: 1172
- Components: AB
- First year: 1912
- Last year: 2012
- Observations: 8
- First position angle: 106
- Last position angle: 105
- First separation: 6.6
- Last separation: 6.3
- Mag first component: 9.94
- Mag second component: 10.4
- Spectral type: B8III
- Primary proper motion RA: -1
- Primary proper motion DEC: 1
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +46 3368
- Notes: U
