21505+3944
- Unique Name: 21505+3944ES 211AC
- RA: 21 50 29.10
- Dec: +39 44 27.0
- Discoverer: ES
- Discoverer Number: 211
- Components: AC
- First year: 1922
- Last year: 2002
- Observations: 3
- First position angle: 170
- Last position angle: 177
- First separation: 9.0
- Last separation: 10.0
- Mag first component: 10.88
- Mag second component: 13.4
- Spectral type:
- Primary proper motion RA: 1
- Primary proper motion DEC: 11
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung:
- Notes: