23121+4517
- Unique Name: 23121+4517BU 1528
- RA: 23 12 11.19
- Dec: +45 16 18.3
- Discoverer: BU
- Discoverer Number: 1528
- Components:
- First year: 1894
- Last year: 2004
- Observations: 8
- First position angle: 191
- Last position angle: 191
- First separation: 33.8
- Last separation: 33.8
- Mag first component: 9.83
- Mag second component: 11.39
- Spectral type:
- Primary proper motion RA: 4
- Primary proper motion DEC: -2
- Secondary proper motion RA: -5
- Secondary proper motion DEC: -5
- Durchmusterung: +44 4349
- Notes: N
