21290+2211
- Unique Name: 21290+2211HJ 1647AC
- RA: 21 28 59.78
- Dec: +22 10 45.9
- Discoverer: HJ
- Discoverer Number: 1647
- Components: AC
- First year: 1892
- Last year: 2013
- Observations: 12
- First position angle: 126
- Last position angle: 128
- First separation: 41.2
- Last separation: 38.8
- Mag first component: 6.08
- Mag second component: 11.8
- Spectral type: M4-5III
- Primary proper motion RA: 34
- Primary proper motion DEC: 13
- Secondary proper motion RA: -7
- Secondary proper motion DEC: -2
- Durchmusterung:
- Notes: L
