21399+3813
- Unique Name: 21399+3813ES 2066
- RA: 21 40 03.45
- Dec: +38 14 48.6
- Discoverer: ES
- Discoverer Number: 2066
- Components:
- First year: 1923
- Last year: 2006
- Observations: 6
- First position angle: 225
- Last position angle: 225
- First separation: 5.5
- Last separation: 5.4
- Mag first component: 11.88
- Mag second component: 12.7
- Spectral type:
- Primary proper motion RA: 14
- Primary proper motion DEC: 10
- Secondary proper motion RA: -31
- Secondary proper motion DEC: 13
- Durchmusterung:
- Notes: B
