20511+5125
- Unique Name: 20511+5125BU 155AD
- RA: 20 51 05.41
- Dec: +51 25 01.7
- Discoverer: BU
- Discoverer Number: 155
- Components: AD
- First year: 1880
- Last year: 2003
- Observations: 7
- First position angle: 48
- Last position angle: 48
- First separation: 199.8
- Last separation: 192.6
- Mag first component: 7.36
- Mag second component: 11.5
- Spectral type: A9IV
- Primary proper motion RA: 40
- Primary proper motion DEC: 43
- Secondary proper motion RA: -2
- Secondary proper motion DEC: -5
- Durchmusterung:
- Notes: