21166+4357
- Unique Name: 21166+4357BRT1147
- RA: 21 16 39.34
- Dec: +43 56 55.8
- Discoverer: BRT
- Discoverer Number: 1147
- Components:
- First year: 1895
- Last year: 2002
- Observations: 3
- First position angle: 166
- Last position angle: 1
- First separation: 1.2
- Last separation: 2.6
- Mag first component: 12.3
- Mag second component: 12.51
- Spectral type:
- Primary proper motion RA: -3
- Primary proper motion DEC: -15
- Secondary proper motion RA: 0
- Secondary proper motion DEC: 6
- Durchmusterung:
- Notes: B
