21103+1008
- Unique Name: 21103+1008BU 71AC
- RA: 21 10 20.47
- Dec: +10 07 55.0
- Discoverer: BU
- Discoverer Number: 71
- Components: AC
- First year: 1877
- Last year: 2011
- Observations: 18
- First position angle: 10
- Last position angle: 359
- First separation: 41.3
- Last separation: 59.4
- Mag first component: 4.7
- Mag second component: 12.5
- Spectral type: A9V
- Primary proper motion RA: 49
- Primary proper motion DEC: -152
- Secondary proper motion RA: -11
- Secondary proper motion DEC: -16
- Durchmusterung:
- Notes: NL
