21454+4356
- Unique Name: 21454+4356HO 168AB
- RA: 21 45 24.12
- Dec: +43 56 08.1
- Discoverer: HO
- Discoverer Number: 168
- Components: AB
- First year: 1885
- Last year: 2011
- Observations: 31
- First position angle: 69
- Last position angle: 41
- First separation: 1.0
- Last separation: 0.9
- Mag first component: 9.46
- Mag second component: 9.55
- Spectral type: K0
- Primary proper motion RA: 66
- Primary proper motion DEC: 6
- Secondary proper motion RA: 66
- Secondary proper motion DEC: 6
- Durchmusterung: +43 4037
- Notes: