21390+5729
- Unique Name: 21390+5729FLE 3DE
- RA: 21 38 56.73
- Dec: +57 29 39.2
- Discoverer: FLE
- Discoverer Number: 3
- Components: DE
- First year: 1874
- Last year: 2003
- Observations: 4
- First position angle: 354
- Last position angle: 351
- First separation: 50.0
- Last separation: 55.2
- Mag first component: 7.53
- Mag second component: 13.19
- Spectral type:
- Primary proper motion RA: -2
- Primary proper motion DEC: -4
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung:
- Notes: N
