21123+3453
- Unique Name: 21123+3453SLE 370AC
- RA: 21 12 16.22
- Dec: +34 53 00.2
- Discoverer: SLE
- Discoverer Number: 370
- Components: AC
- First year: 1941
- Last year: 2002
- Observations: 7
- First position angle: 198
- Last position angle: 200
- First separation: 16.2
- Last separation: 16.4
- Mag first component: 11.79
- Mag second component: 11.1
- Spectral type:
- Primary proper motion RA: -5
- Primary proper motion DEC: -11
- Secondary proper motion RA: 5
- Secondary proper motion DEC: 1
- Durchmusterung:
- Notes: