21353+5210
- Unique Name: 21353+5210HU 594AC
- RA: 21 35 20.07
- Dec: +52 10 10.5
- Discoverer: HU
- Discoverer Number: 594
- Components: AC
- First year: 1902
- Last year: 2003
- Observations: 7
- First position angle: 90
- Last position angle: 88
- First separation: 58.8
- Last separation: 59.1
- Mag first component: 9.27
- Mag second component: 11.14
- Spectral type: B5
- Primary proper motion RA: 4
- Primary proper motion DEC: -4
- Secondary proper motion RA: 8
- Secondary proper motion DEC: 7
- Durchmusterung:
- Notes: