21057+3215
- Unique Name: 21057+3215KU 130
- RA: 21 05 43.84
- Dec: +32 14 57.4
- Discoverer: KU
- Discoverer Number: 130
- Components:
- First year: 1893
- Last year: 2004
- Observations: 9
- First position angle: 59
- Last position angle: 58
- First separation: 19.0
- Last separation: 19.4
- Mag first component: 10.21
- Mag second component: 11.36
- Spectral type: F0
- Primary proper motion RA: 0
- Primary proper motion DEC: -3
- Secondary proper motion RA: 0
- Secondary proper motion DEC: -1
- Durchmusterung: +31 4332
- Notes: