21058+3929
- Unique Name: 21058+3929A 2691AC
- RA: 21 05 44.84
- Dec: +39 29 29.4
- Discoverer: A
- Discoverer Number: 2691
- Components: AC
- First year: 1892
- Last year: 2002
- Observations: 9
- First position angle: 314
- Last position angle: 314
- First separation: 27.4
- Last separation: 27.3
- Mag first component: 9.71
- Mag second component: 11.81
- Spectral type: B9IV
- Primary proper motion RA: 0
- Primary proper motion DEC: -8
- Secondary proper motion RA: 1
- Secondary proper motion DEC: -7
- Durchmusterung:
- Notes: