20511+5125
- Unique Name: 20511+5125BU 155AC
- RA: 20 51 05.41
- Dec: +51 25 01.7
- Discoverer: BU
- Discoverer Number: 155
- Components: AC
- First year: 1885
- Last year: 1999
- Observations: 7
- First position angle: 26
- Last position angle: 40
- First separation: 17.7
- Last separation: 15.3
- Mag first component: 7.36
- Mag second component: 12.6
- Spectral type: A9IV
- Primary proper motion RA: 40
- Primary proper motion DEC: 41
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung:
- Notes: