21426+1900
- Unique Name: 21426+1900HO 165
- RA: 21 42 34.56
- Dec: +18 59 37.2
- Discoverer: HO
- Discoverer Number: 165
- Components:
- First year: 1886
- Last year: 2010
- Observations: 49
- First position angle: 63
- Last position angle: 62
- First separation: 0.4
- Last separation: 0.7
- Mag first component: 8.99
- Mag second component: 9.19
- Spectral type: A2
- Primary proper motion RA: 12
- Primary proper motion DEC: -8
- Secondary proper motion RA: 12
- Secondary proper motion DEC: -8
- Durchmusterung: +18 4844
- Notes: N
