21190+3905
- Unique Name: 21190+3905SEI1498AB
- RA: 21 18 54.68
- Dec: +39 05 27.7
- Discoverer: SEI
- Discoverer Number: 1498
- Components: AB
- First year: 1895
- Last year: 2012
- Observations: 8
- First position angle: 91
- Last position angle: 91
- First separation: 28.9
- Last separation: 29.0
- Mag first component: 11.79
- Mag second component: 12.64
- Spectral type:
- Primary proper motion RA: -1
- Primary proper motion DEC: -2
- Secondary proper motion RA: -4
- Secondary proper motion DEC: -5
- Durchmusterung:
- Notes: