21426+4226
- Unique Name: 21426+4226STF2820AB
- RA: 21 42 34.15
- Dec: +42 26 26.5
- Discoverer: STF
- Discoverer Number: 2820
- Components: AB
- First year: 1895
- Last year: 2012
- Observations: 14
- First position angle: 233
- Last position angle: 233
- First separation: 15.9
- Last separation: 16.3
- Mag first component: 7.48
- Mag second component: 10.56
- Spectral type: A0
- Primary proper motion RA: 5
- Primary proper motion DEC: -12
- Secondary proper motion RA: 3
- Secondary proper motion DEC: -14
- Durchmusterung: +41 4243
- Notes: