21457+3152
- Unique Name: 21457+3152J 2356
- RA: 21 45 37.39
- Dec: +31 51 55.5
- Discoverer: J
- Discoverer Number: 2356
- Components:
- First year: 1902
- Last year: 2002
- Observations: 5
- First position angle: 141
- Last position angle: 135
- First separation: 4.7
- Last separation: 6.3
- Mag first component: 12.81
- Mag second component: 12.97
- Spectral type:
- Primary proper motion RA: 0
- Primary proper motion DEC: 1
- Secondary proper motion RA: 18
- Secondary proper motion DEC: -7
- Durchmusterung:
- Notes: B
