21503+3451
- Unique Name: 21503+3451ES 2200BC
- RA: 21 50 20.53
- Dec: +34 50 54.2
- Discoverer: ES
- Discoverer Number: 2200
- Components: BC
- First year: 1925
- Last year: 1996
- Observations: 3
- First position angle: 173
- Last position angle: 179
- First separation: 1.2
- Last separation: 1.0
- Mag first component: 11.0
- Mag second component: 12.0
- Spectral type:
- Primary proper motion RA: 3
- Primary proper motion DEC: 4
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung:
- Notes: