21566+3421
- Unique Name: 21566+3421BU 1214AB,F
- RA: 21 56 36.00
- Dec: +34 20 53.3
- Discoverer: BU
- Discoverer Number: 1214
- Components: AB,F
- First year: 2000
- Last year: 2002
- Observations: 3
- First position angle: 3
- Last position angle: 3
- First separation: 48.0
- Last separation: 48.0
- Mag first component: 9.32
- Mag second component: 14.5
- Spectral type:
- Primary proper motion RA: 10
- Primary proper motion DEC: 0
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung:
- Notes: