21172-0414
- Unique Name: 21172-0414BU 161BC
- RA: 21 17 09.43
- Dec: -04 12 42.8
- Discoverer: BU
- Discoverer Number: 161
- Components: BC
- First year: 1873
- Last year: 2002
- Observations: 9
- First position angle: 300
- Last position angle: 316
- First separation: 2.5
- Last separation: 7.9
- Mag first component: 10.29
- Mag second component: 11.6
- Spectral type:
- Primary proper motion RA: 10
- Primary proper motion DEC: 0
- Secondary proper motion RA: -9
- Secondary proper motion DEC: 22
- Durchmusterung:
- Notes: N
