21424+1750
- Unique Name: 21424+1750BU 691AE
- RA: 21 42 25.22
- Dec: +17 50 09.5
- Discoverer: BU
- Discoverer Number: 691
- Components: AE
- First year: 1900
- Last year: 2001
- Observations: 6
- First position angle: 68
- Last position angle: 79
- First separation: 90.3
- Last separation: 115.4
- Mag first component: 8.9
- Mag second component: 12.3
- Spectral type:
- Primary proper motion RA: 24
- Primary proper motion DEC: -6
- Secondary proper motion RA: 264
- Secondary proper motion DEC: -112
- Durchmusterung:
- Notes: NU
