21426+4103
- Unique Name: 21426+4103BU 688AB,C
- RA: 21 42 33.41
- Dec: +41 02 51.0
- Discoverer: BU
- Discoverer Number: 688
- Components: AB,C
- First year: 1914
- Last year: 2002
- Observations: 3
- First position angle: 35
- Last position angle: 30
- First separation: 29.3
- Last separation: 27.2
- Mag first component: 7.5
- Mag second component: 11.9
- Spectral type: F2V
- Primary proper motion RA: 26
- Primary proper motion DEC: 0
- Secondary proper motion RA: -2
- Secondary proper motion DEC: -8
- Durchmusterung:
- Notes: N
