21399+4908
- Unique Name: 21399+4908ES 825AC
- RA: 21 39 55.58
- Dec: +49 07 58.0
- Discoverer: ES
- Discoverer Number: 825
- Components: AC
- First year: 1894
- Last year: 2003
- Observations: 13
- First position angle: 287
- Last position angle: 285
- First separation: 55.9
- Last separation: 57.5
- Mag first component: 7.25
- Mag second component: 9.56
- Spectral type: K1II
- Primary proper motion RA: 10
- Primary proper motion DEC: 2
- Secondary proper motion RA: -7
- Secondary proper motion DEC: -2
- Durchmusterung: +48 3456
- Notes: