21056+6030
- Unique Name: 21056+6030A 758AB
- RA: 21 05 34.47
- Dec: +60 29 33.5
- Discoverer: A
- Discoverer Number: 758
- Components: AB
- First year: 1904
- Last year: 2008
- Observations: 17
- First position angle: 353
- Last position angle: 124
- First separation: 0.3
- Last separation: 0.4
- Mag first component: 9.89
- Mag second component: 10.76
- Spectral type: A5
- Primary proper motion RA: 6
- Primary proper motion DEC: 4
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +59 2315
- Notes: O
