20559+3921
- Unique Name: 20559+3921MLB 958
- RA: 20 55 57.21
- Dec: +39 20 57.3
- Discoverer: MLB
- Discoverer Number: 958
- Components:
- First year: 1934
- Last year: 2002
- Observations: 3
- First position angle: 176
- Last position angle: 171
- First separation: 5.1
- Last separation: 5.3
- Mag first component: 10.0
- Mag second component: 12.0
- Spectral type:
- Primary proper motion RA: -31
- Primary proper motion DEC: 94
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung:
- Notes: