21434+3817
- Unique Name: 21434+3817S 799BD
- RA: 21 43 36.64
- Dec: +38 18 16.4
- Discoverer: S
- Discoverer Number: 799
- Components: BD
- First year: 1905
- Last year: 2002
- Observations: 3
- First position angle: 249
- Last position angle: 254
- First separation: 30.8
- Last separation: 33.7
- Mag first component: 6.98
- Mag second component: 13.9
- Spectral type: A0
- Primary proper motion RA: 25
- Primary proper motion DEC: -26
- Secondary proper motion RA: 5
- Secondary proper motion DEC: -30
- Durchmusterung: +37 4410
- Notes: N
