21183+3456
- Unique Name: 21183+3456SLE 384AD
- RA: 21 18 18.20
- Dec: +34 55 36.2
- Discoverer: SLE
- Discoverer Number: 384
- Components: AD
- First year: 1941
- Last year: 2012
- Observations: 9
- First position angle: 187
- Last position angle: 190
- First separation: 41.7
- Last separation: 43.0
- Mag first component: 9.13
- Mag second component: 11.0
- Spectral type:
- Primary proper motion RA: 28
- Primary proper motion DEC: 9
- Secondary proper motion RA: -9
- Secondary proper motion DEC: -7
- Durchmusterung:
- Notes: