21257+3422
- Unique Name: 21257+3422GRV 465
- RA: 21 25 47.93
- Dec: +34 22 32.7
- Discoverer: GRV
- Discoverer Number: 465
- Components:
- First year: 1934
- Last year: 2002
- Observations: 4
- First position angle: 6
- Last position angle: 6
- First separation: 51.3
- Last separation: 51.1
- Mag first component: 12.44
- Mag second component: 12.92
- Spectral type:
- Primary proper motion RA: -9
- Primary proper motion DEC: -11
- Secondary proper motion RA: -13
- Secondary proper motion DEC: -11
- Durchmusterung:
- Notes: