21190+3945
- Unique Name: 21190+3945ARY 5AC
- RA: 21 19 00.03
- Dec: +39 44 57.6
- Discoverer: ARY
- Discoverer Number: 5
- Components: AC
- First year: 1895
- Last year: 2002
- Observations: 8
- First position angle: 318
- Last position angle: 316
- First separation: 97.7
- Last separation: 97.9
- Mag first component: 6.67
- Mag second component: 10.96
- Spectral type: B9V
- Primary proper motion RA: 15
- Primary proper motion DEC: 8
- Secondary proper motion RA: -1
- Secondary proper motion DEC: -2
- Durchmusterung:
- Notes: N
