05103+4040
- Unique Name: 05103+4040ES 1721
- RA: 05 10 17.68
- Dec: +40 39 35.2
- Discoverer: ES
- Discoverer Number: 1721
- Components:
- First year: 1918
- Last year: 2002
- Observations: 3
- First position angle: 162
- Last position angle: 168
- First separation: 5.7
- Last separation: 6.3
- Mag first component: 8.95
- Mag second component: 11.8
- Spectral type: B2:III:nn
- Primary proper motion RA: -1
- Primary proper motion DEC: -2
- Secondary proper motion RA: 65
- Secondary proper motion DEC: -334
- Durchmusterung: +40 1189
- Notes: