21456+2417
- Unique Name: 21456+2417POU5491AB
- RA: 21 45 37.26
- Dec: +24 16 45.2
- Discoverer: POU
- Discoverer Number: 5491
- Components: AB
- First year: 1898
- Last year: 2008
- Observations: 4
- First position angle: 9
- Last position angle: 6
- First separation: 9.8
- Last separation: 10.1
- Mag first component: 13.1
- Mag second component: 14.0
- Spectral type:
- Primary proper motion RA: 1
- Primary proper motion DEC: -1
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung:
- Notes: