21183+3456
- Unique Name: 21183+3456FYM 142EI
- RA: 21 18 21.22
- Dec: +34 55 33.8
- Discoverer: FYM
- Discoverer Number: 142
- Components: EI
- First year: 1998
- Last year: 2012
- Observations: 3
- First position angle: 273
- Last position angle: 279
- First separation: 9.8
- Last separation: 7.1
- Mag first component: 13.5
- Mag second component: 15.7
- Spectral type:
- Primary proper motion RA: 9
- Primary proper motion DEC: -4
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung:
- Notes: