21566+3421
- Unique Name: 21566+3421BU 1214FG
- RA: 21 56 36.22
- Dec: +34 21 41.2
- Discoverer: BU
- Discoverer Number: 1214
- Components: FG
- First year: 2000
- Last year: 2000
- Observations: 2
- First position angle: 240
- Last position angle: 240
- First separation: 6.9
- Last separation: 7.1
- Mag first component: 12.98
- Mag second component: 14.23
- Spectral type:
- Primary proper motion RA: 38
- Primary proper motion DEC: 27
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung:
- Notes: K
