20210+3919
- Unique Name: 20210+3919TOB 186BC
- RA: 20 21 03.80
- Dec: +39 17 52.5
- Discoverer: TOB
- Discoverer Number: 186
- Components: BC
- First year: 1983
- Last year: 2008
- Observations: 5
- First position angle: 44
- Last position angle: 52
- First separation: 16.1
- Last separation: 16.4
- Mag first component: 12.19
- Mag second component: 12.09
- Spectral type:
- Primary proper motion RA: 4
- Primary proper motion DEC: 13
- Secondary proper motion RA: -1
- Secondary proper motion DEC: -3
- Durchmusterung:
- Notes: