21406+5419
- Unique Name: 21406+5419ES 35AB
- RA: 21 40 39.10
- Dec: +54 19 29.0
- Discoverer: ES
- Discoverer Number: 35
- Components: AB
- First year: 1900
- Last year: 2009
- Observations: 10
- First position angle: 224
- Last position angle: 218
- First separation: 11.1
- Last separation: 10.0
- Mag first component: 8.19
- Mag second component: 12.4
- Spectral type: M8e
- Primary proper motion RA: -7
- Primary proper motion DEC: -11
- Secondary proper motion RA: -12
- Secondary proper motion DEC: -21
- Durchmusterung: +53 2684
- Notes: NU
