21290+3224
- Unique Name: 21290+3224ES 378AB
- RA: 21 29 00.11
- Dec: +32 23 49.5
- Discoverer: ES
- Discoverer Number: 378
- Components: AB
- First year: 1906
- Last year: 2013
- Observations: 4
- First position angle: 203
- Last position angle: 203
- First separation: 7.7
- Last separation: 9.6
- Mag first component: 9.56
- Mag second component: 12.0
- Spectral type: A2
- Primary proper motion RA: 9
- Primary proper motion DEC: 9
- Secondary proper motion RA: -27
- Secondary proper motion DEC: -19
- Durchmusterung: +31 4470
- Notes: