20209-3450
- Unique Name: 20209-3450B 478
- RA: 20 20 54.41
- Dec: -34 49 55.0
- Discoverer: B
- Discoverer Number: 478
- Components:
- First year: 1912
- Last year: 1999
- Observations: 9
- First position angle: 32
- Last position angle: 28
- First separation: 5.7
- Last separation: 6.1
- Mag first component: 10.15
- Mag second component: 10.9
- Spectral type:
- Primary proper motion RA: 61
- Primary proper motion DEC: -75
- Secondary proper motion RA: 125
- Secondary proper motion DEC: 38
- Durchmusterung: -3514070
- Notes: