21504+2303
- Unique Name: 21504+2303J 3147AB
- RA: 21 50 17.24
- Dec: +23 04 22.7
- Discoverer: J
- Discoverer Number: 3147
- Components: AB
- First year: 1944
- Last year: 2006
- Observations: 5
- First position angle: 220
- Last position angle: 219
- First separation: 4.0
- Last separation: 5.1
- Mag first component: 12.4
- Mag second component: 12.4
- Spectral type:
- Primary proper motion RA: 0
- Primary proper motion DEC: -9
- Secondary proper motion RA: -11
- Secondary proper motion DEC: -14
- Durchmusterung:
- Notes:
