21103+4359
- Unique Name: 21103+4359STF2773AB
- RA: 21 10 14.01
- Dec: +43 59 51.7
- Discoverer: STF
- Discoverer Number: 2773
- Components: AB
- First year: 1828
- Last year: 2010
- Observations: 45
- First position angle: 114
- Last position angle: 114
- First separation: 2.5
- Last separation: 3.3
- Mag first component: 8.46
- Mag second component: 9.09
- Spectral type: A0
- Primary proper motion RA: -12
- Primary proper motion DEC: 10
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +43 3825
- Notes: D
