21020+3745
- Unique Name: 21020+3745COU2223
- RA: 21 02 03.41
- Dec: +37 44 04.2
- Discoverer: COU
- Discoverer Number: 2223
- Components:
- First year: 1984
- Last year: 2009
- Observations: 4
- First position angle: 181
- Last position angle: 179
- First separation: 1.4
- Last separation: 1.9
- Mag first component: 9.84
- Mag second component: 10.8
- Spectral type:
- Primary proper motion RA: -9
- Primary proper motion DEC: -5
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +37 4353
- Notes: