21078+3421
- Unique Name: 21078+3421ABH 141AJ
- RA: 21 07 47.29
- Dec: +34 21 24.8
- Discoverer: ABH
- Discoverer Number: 141
- Components: AJ
- First year: 1987
- Last year: 2012
- Observations: 4
- First position angle: 223
- Last position angle: 222
- First separation: 62.1
- Last separation: 61.8
- Mag first component: 10.22
- Mag second component: 14.3
- Spectral type: A7III
- Primary proper motion RA: 8
- Primary proper motion DEC: -2
- Secondary proper motion RA: 5
- Secondary proper motion DEC: -6
- Durchmusterung:
- Notes: U
