21399+4908
- Unique Name: 21399+4908ES 825AB
- RA: 21 39 55.58
- Dec: +49 07 58.0
- Discoverer: ES
- Discoverer Number: 825
- Components: AB
- First year: 1909
- Last year: 2003
- Observations: 3
- First position angle: 253
- Last position angle: 257
- First separation: 9.6
- Last separation: 12.2
- Mag first component: 7.25
- Mag second component: 11.5
- Spectral type: K1II
- Primary proper motion RA: 10
- Primary proper motion DEC: 2
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +48 3457
- Notes: