21503+7410
- Unique Name: 21503+7410UC 4578BC
- RA: 21 50 17.26
- Dec: +74 08 23.2
- Discoverer: UC
- Discoverer Number: 4578
- Components: BC
- First year: 2000
- Last year: 2003
- Observations: 2
- First position angle: 48
- Last position angle: 48
- First separation: 71.6
- Last separation: 71.3
- Mag first component: 15.36
- Mag second component: 16.6
- Spectral type:
- Primary proper motion RA: -3
- Primary proper motion DEC: 107
- Secondary proper motion RA: -5
- Secondary proper motion DEC: 95
- Durchmusterung:
- Notes: V