12109+0818
- Unique Name: 12109+0818HEI 509
- RA: 12 10 50.11
- Dec: +08 17 49.8
- Discoverer: HEI
- Discoverer Number: 509
- Components:
- First year: 1989
- Last year: 1996
- Observations: 3
- First position angle: 92
- Last position angle: 92
- First separation: 0.6
- Last separation: 0.6
- Mag first component: 11.19
- Mag second component: 12.05
- Spectral type:
- Primary proper motion RA: -19
- Primary proper motion DEC: -1
- Secondary proper motion RA: -19
- Secondary proper motion DEC: -1
- Durchmusterung: +09 2595
- Notes: