21420+1856
- Unique Name: 21420+1856STF2818AB
- RA: 21 41 59.91
- Dec: +18 56 19.7
- Discoverer: STF
- Discoverer Number: 2818
- Components: AB
- First year: 1895
- Last year: 2012
- Observations: 19
- First position angle: 19
- Last position angle: 25
- First separation: 20.0
- Last separation: 26.3
- Mag first component: 7.38
- Mag second component: 10.24
- Spectral type: G7III
- Primary proper motion RA: -36
- Primary proper motion DEC: -46
- Secondary proper motion RA: 0
- Secondary proper motion DEC: -3
- Durchmusterung:
- Notes: N
