21321+3949
- Unique Name: 21321+3949COU1974
- RA: 21 32 03.91
- Dec: +39 48 52.4
- Discoverer: COU
- Discoverer Number: 1974
- Components:
- First year: 1980
- Last year: 2007
- Observations: 2
- First position angle: 93
- Last position angle: 134
- First separation: 0.4
- Last separation: 0.2
- Mag first component: 9.6
- Mag second component: 11.8
- Spectral type: G5
- Primary proper motion RA: 1
- Primary proper motion DEC: -19
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +39 4581
- Notes: