21434+3817
- Unique Name: 21434+3817S 799AB
- RA: 21 43 25.63
- Dec: +38 17 01.0
- Discoverer: S
- Discoverer Number: 799
- Components: AB
- First year: 1824
- Last year: 2013
- Observations: 33
- First position angle: 59
- Last position angle: 60
- First separation: 153.2
- Last separation: 149.6
- Mag first component: 5.69
- Mag second component: 7.0
- Spectral type: A0V
- Primary proper motion RA: 34
- Primary proper motion DEC: -5
- Secondary proper motion RA: 25
- Secondary proper motion DEC: -26
- Durchmusterung: +37 4408
- Notes: N
