21426+4226
- Unique Name: 21426+4226BU 1505AC
- RA: 21 42 34.15
- Dec: +42 26 26.5
- Discoverer: BU
- Discoverer Number: 1505
- Components: AC
- First year: 1903
- Last year: 2012
- Observations: 5
- First position angle: 198
- Last position angle: 200
- First separation: 34.4
- Last separation: 33.3
- Mag first component: 7.48
- Mag second component: 12.68
- Spectral type: A0
- Primary proper motion RA: 5
- Primary proper motion DEC: -12
- Secondary proper motion RA: -9
- Secondary proper motion DEC: -7
- Durchmusterung:
- Notes: