21078+3421
- Unique Name: 21078+3421HJ 1614AC
- RA: 21 07 47.29
- Dec: +34 21 24.8
- Discoverer: HJ
- Discoverer Number: 1614
- Components: AC
- First year: 1927
- Last year: 2012
- Observations: 8
- First position angle: 258
- Last position angle: 257
- First separation: 10.3
- Last separation: 12.4
- Mag first component: 10.22
- Mag second component: 11.3
- Spectral type: A7III
- Primary proper motion RA: 8
- Primary proper motion DEC: -2
- Secondary proper motion RA: -15
- Secondary proper motion DEC: -9
- Durchmusterung:
- Notes: U
