21158+6721
- Unique Name: 21158+6721STF2788
- RA: 21 15 48.83
- Dec: +67 21 14.1
- Discoverer: STF
- Discoverer Number: 2788
- Components:
- First year: 1893
- Last year: 2010
- Observations: 12
- First position angle: 356
- Last position angle: 353
- First separation: 8.3
- Last separation: 8.1
- Mag first component: 8.73
- Mag second component: 10.4
- Spectral type: K2III
- Primary proper motion RA: 18
- Primary proper motion DEC: 2
- Secondary proper motion RA: 15
- Secondary proper motion DEC: 0
- Durchmusterung: +66 1380
- Notes: D
