21171+3546
- Unique Name: 21171+3546BU 162AC
- RA: 21 17 06.82
- Dec: +35 46 10.3
- Discoverer: BU
- Discoverer Number: 162
- Components: AC
- First year: 1941
- Last year: 2002
- Observations: 5
- First position angle: 133
- Last position angle: 131
- First separation: 16.2
- Last separation: 15.6
- Mag first component: 8.6
- Mag second component: 12.6
- Spectral type: A7IV
- Primary proper motion RA: 7
- Primary proper motion DEC: -22
- Secondary proper motion RA: -1
- Secondary proper motion DEC: -6
- Durchmusterung:
- Notes: