21066+3645
- Unique Name: 21066+3645SEI1404AB
- RA: 21 06 31.68
- Dec: +36 44 32.6
- Discoverer: SEI
- Discoverer Number: 1404
- Components: AB
- First year: 1896
- Last year: 2002
- Observations: 4
- First position angle: 306
- Last position angle: 307
- First separation: 24.1
- Last separation: 24.0
- Mag first component: 10.5
- Mag second component: 10.8
- Spectral type:
- Primary proper motion RA: -11
- Primary proper motion DEC: -12
- Secondary proper motion RA: -9
- Secondary proper motion DEC: -7
- Durchmusterung:
- Notes: