20511+5125
- Unique Name: 20511+5125BU 155AB
- RA: 20 51 05.41
- Dec: +51 25 01.7
- Discoverer: BU
- Discoverer Number: 155
- Components: AB
- First year: 1873
- Last year: 2011
- Observations: 60
- First position angle: 40
- Last position angle: 39
- First separation: 0.6
- Last separation: 0.7
- Mag first component: 7.36
- Mag second component: 8.13
- Spectral type: A9IV
- Primary proper motion RA: 40
- Primary proper motion DEC: 41
- Secondary proper motion RA: 40
- Secondary proper motion DEC: 41
- Durchmusterung: +50 3215
- Notes: