20431+1705
- Unique Name: 20431+1705BLL 51
- RA: 20 43 03.51
- Dec: +17 06 10.1
- Discoverer: BLL
- Discoverer Number: 51
- Components:
- First year: 1879
- Last year: 2013
- Observations: 13
- First position angle: 162
- Last position angle: 159
- First separation: 55.8
- Last separation: 56.5
- Mag first component: 8.72
- Mag second component: 9.56
- Spectral type: M5
- Primary proper motion RA: -4
- Primary proper motion DEC: 6
- Secondary proper motion RA: 8
- Secondary proper motion DEC: 7
- Durchmusterung: +16 4351
- Notes: N
