21066+3645
- Unique Name: 21066+3645TOB 209BC
- RA: 21 06 30.00
- Dec: +36 44 45.8
- Discoverer: TOB
- Discoverer Number: 209
- Components: BC
- First year: 1983
- Last year: 2002
- Observations: 3
- First position angle: 323
- Last position angle: 323
- First separation: 19.3
- Last separation: 19.2
- Mag first component: 10.8
- Mag second component: 12.5
- Spectral type:
- Primary proper motion RA: -9
- Primary proper motion DEC: -7
- Secondary proper motion RA: -8
- Secondary proper motion DEC: -4
- Durchmusterung:
- Notes: