21058+3929
- Unique Name: 21058+3929A 2691AB
- RA: 21 05 44.84
- Dec: +39 29 29.4
- Discoverer: A
- Discoverer Number: 2691
- Components: AB
- First year: 1913
- Last year: 2000
- Observations: 6
- First position angle: 219
- Last position angle: 217
- First separation: 2.5
- Last separation: 2.7
- Mag first component: 9.71
- Mag second component: 13.6
- Spectral type: B9IV
- Primary proper motion RA: 0
- Primary proper motion DEC: -6
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +38 4340
- Notes: