21118+5959
- Unique Name: 21118+5959STF2780AC
- RA: 21 11 48.24
- Dec: +59 59 11.8
- Discoverer: STF
- Discoverer Number: 2780
- Components: AC
- First year: 1878
- Last year: 2011
- Observations: 16
- First position angle: 212
- Last position angle: 211
- First separation: 119.9
- Last separation: 120.5
- Mag first component: 6.09
- Mag second component: 8.9
- Spectral type: B0II
- Primary proper motion RA: -3
- Primary proper motion DEC: -4
- Secondary proper motion RA: -4
- Secondary proper motion DEC: -5
- Durchmusterung: +59 2333
- Notes: N
