21429+3734
- Unique Name: 21429+3734ES 2521AB
- RA: 21 42 55.76
- Dec: +37 34 09.8
- Discoverer: ES
- Discoverer Number: 2521
- Components: AB
- First year: 1931
- Last year: 2002
- Observations: 3
- First position angle: 197
- Last position angle: 200
- First separation: 7.5
- Last separation: 8.2
- Mag first component: 9.5
- Mag second component: 12.5
- Spectral type: A0
- Primary proper motion RA: -5
- Primary proper motion DEC: -9
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +36 4660
- Notes: