21103+5512
- Unique Name: 21103+5512BU 1500AB
- RA: 21 10 18.64
- Dec: +55 11 55.9
- Discoverer: BU
- Discoverer Number: 1500
- Components: AB
- First year: 1907
- Last year: 2003
- Observations: 3
- First position angle: 117
- Last position angle: 114
- First separation: 8.2
- Last separation: 7.9
- Mag first component: 10.64
- Mag second component: 14.6
- Spectral type: B8
- Primary proper motion RA: 2
- Primary proper motion DEC: -6
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +54 2487
- Notes:
