20399+4221
- Unique Name: 20399+4221FMR 159
- RA: 20 39 52.60
- Dec: +42 20 33.5
- Discoverer: FMR
- Discoverer Number: 159
- Components:
- First year: 1998
- Last year: 2002
- Observations: 2
- First position angle: 76
- Last position angle: 76
- First separation: 135.8
- Last separation: 135.8
- Mag first component: 15.1
- Mag second component: 17.4
- Spectral type: M1.5V+M4V
- Primary proper motion RA: 367
- Primary proper motion DEC: 124
- Secondary proper motion RA: 381
- Secondary proper motion DEC: 130
- Durchmusterung:
- Notes: V