21123+3453
- Unique Name: 21123+3453SLE 370AB
- RA: 21 12 16.22
- Dec: +34 53 00.2
- Discoverer: SLE
- Discoverer Number: 370
- Components: AB
- First year: 1982
- Last year: 2002
- Observations: 3
- First position angle: 266
- Last position angle: 266
- First separation: 9.5
- Last separation: 9.8
- Mag first component: 11.79
- Mag second component: 14.5
- Spectral type:
- Primary proper motion RA: -5
- Primary proper motion DEC: -11
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung:
- Notes: