21210+0217
- Unique Name: 21210+0217HEI 408AB
- RA: 21 20 57.65
- Dec: +02 17 26.7
- Discoverer: HEI
- Discoverer Number: 408
- Components: AB
- First year: 1986
- Last year: 2003
- Observations: 6
- First position angle: 258
- Last position angle: 257
- First separation: 2.1
- Last separation: 2.3
- Mag first component: 10.96
- Mag second component: 11.2
- Spectral type:
- Primary proper motion RA: -8
- Primary proper motion DEC: -2
- Secondary proper motion RA: -14
- Secondary proper motion DEC: 0
- Durchmusterung:
- Notes: N
