21190+3905
- Unique Name: 21190+3905TOB 220BC
- RA: 21 18 57.17
- Dec: +39 05 27.2
- Discoverer: TOB
- Discoverer Number: 220
- Components: BC
- First year: 1983
- Last year: 2002
- Observations: 3
- First position angle: 74
- Last position angle: 75
- First separation: 14.3
- Last separation: 12.5
- Mag first component: 12.64
- Mag second component: 14.9
- Spectral type:
- Primary proper motion RA: -4
- Primary proper motion DEC: -5
- Secondary proper motion RA: 17
- Secondary proper motion DEC: -2
- Durchmusterung:
- Notes:
