21172-0414
- Unique Name: 21172-0414BU 161AB
- RA: 21 17 10.66
- Dec: -04 14 22.3
- Discoverer: BU
- Discoverer Number: 161
- Components: AB
- First year: 1873
- Last year: 2003
- Observations: 14
- First position angle: 330
- Last position angle: 351
- First separation: 90.0
- Last separation: 100.7
- Mag first component: 8.18
- Mag second component: 10.29
- Spectral type: K0
- Primary proper motion RA: 10
- Primary proper motion DEC: 2
- Secondary proper motion RA: 10
- Secondary proper motion DEC: 0
- Durchmusterung: -04 5404
- Notes: N
