21078+3421
- Unique Name: 21078+3421ABH 141AI
- RA: 21 07 47.29
- Dec: +34 21 24.8
- Discoverer: ABH
- Discoverer Number: 141
- Components: AI
- First year: 1987
- Last year: 2002
- Observations: 3
- First position angle: 124
- Last position angle: 124
- First separation: 108.3
- Last separation: 107.7
- Mag first component: 10.22
- Mag second component: 14.9
- Spectral type: A7III
- Primary proper motion RA: 8
- Primary proper motion DEC: -2
- Secondary proper motion RA: 1
- Secondary proper motion DEC: -6
- Durchmusterung:
- Notes: U
