21172-0414
- Unique Name: 21172-0414BU 161DF
- RA: 21 17 09.13
- Dec: -04 13 59.1
- Discoverer: BU
- Discoverer Number: 161
- Components: DF
- First year: 1891
- Last year: 2000
- Observations: 4
- First position angle: 16
- Last position angle: 9
- First separation: 11.7
- Last separation: 10.7
- Mag first component: 13.7
- Mag second component: 13.7
- Spectral type:
- Primary proper motion RA: -91
- Primary proper motion DEC: -51
- Secondary proper motion RA: -19
- Secondary proper motion DEC: 28
- Durchmusterung:
- Notes: N
