21566+3421
- Unique Name: 21566+3421BU 1214CE
- RA: 21 56 38.22
- Dec: +34 22 37.4
- Discoverer: BU
- Discoverer Number: 1214
- Components: CE
- First year: 1890
- Last year: 2002
- Observations: 4
- First position angle: 285
- Last position angle: 301
- First separation: 20.0
- Last separation: 12.9
- Mag first component: 9.8
- Mag second component: 15.3
- Spectral type:
- Primary proper motion RA: 10
- Primary proper motion DEC: 0
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung:
- Notes: R
