21420+1856
- Unique Name: 21420+1856LBU 2Aa,Ab
- RA: 21 41 59.91
- Dec: +18 56 19.7
- Discoverer: LBU
- Discoverer Number: 2
- Components: Aa,Ab
- First year: 1985
- Last year: 1985
- Observations: 1
- First position angle: 42
- Last position angle: 42
- First separation: 0.9
- Last separation: 0.9
- Mag first component: 8.0
- Mag second component: 9.5
- Spectral type: G7III
- Primary proper motion RA: -36
- Primary proper motion DEC: -47
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +18 4841
- Notes: N
