21435+5847
- Unique Name: 21435+5847BU 690AB
- RA: 21 43 30.45
- Dec: +58 46 48.2
- Discoverer: BU
- Discoverer Number: 690
- Components: AB
- First year: 1878
- Last year: 2012
- Observations: 12
- First position angle: 260
- Last position angle: 259
- First separation: 19.3
- Last separation: 19.3
- Mag first component: 4.2
- Mag second component: 12.3
- Spectral type: M2Iae+K2I
- Primary proper motion RA: 5
- Primary proper motion DEC: 3
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +58 2316
- Notes: NV
