12403+2131
- Unique Name: 12403+2131LDS 939
- RA: 12 40 17.07
- Dec: +21 31 12.4
- Discoverer: LDS
- Discoverer Number: 939
- Components:
- First year: 1936
- Last year: 2001
- Observations: 3
- First position angle: 90
- Last position angle: 91
- First separation: 83.0
- Last separation: 83.1
- Mag first component: 8.04
- Mag second component: 12.01
- Spectral type: F8
- Primary proper motion RA: -7
- Primary proper motion DEC: -95
- Secondary proper motion RA: -6
- Secondary proper motion DEC: -95
- Durchmusterung: +22 2500
- Notes: