21103+1008
- Unique Name: 21103+1008KNT 5AB
- RA: 21 10 20.47
- Dec: +10 07 55.0
- Discoverer: KNT
- Discoverer Number: 5
- Components: AB
- First year: 1867
- Last year: 2002
- Observations: 31
- First position angle: 277
- Last position angle: 258
- First separation: 2.1
- Last separation: 1.0
- Mag first component: 4.7
- Mag second component: 8.69
- Spectral type: A9V
- Primary proper motion RA: 51
- Primary proper motion DEC: -153
- Secondary proper motion RA: 49
- Secondary proper motion DEC: -152
- Durchmusterung: +09 4732
- Notes: N D
