21345+5517
- Unique Name: 21345+5517STI2573
- RA: 21 34 33.93
- Dec: +55 16 36.8
- Discoverer: STI
- Discoverer Number: 2573
- Components:
- First year: 1902
- Last year: 2010
- Observations: 7
- First position angle: 6
- Last position angle: 4
- First separation: 9.2
- Last separation: 9.4
- Mag first component: 10.85
- Mag second component: 11.28
- Spectral type:
- Primary proper motion RA: -3
- Primary proper motion DEC: -5
- Secondary proper motion RA: -4
- Secondary proper motion DEC: -3
- Durchmusterung:
- Notes: