18309+3840
- Unique Name: 18309+3840STF2338AB
- RA: 18 30 54.75
- Dec: +38 39 33.8
- Discoverer: STF
- Discoverer Number: 2338
- Components: AB
- First year: 1828
- Last year: 2013
- Observations: 20
- First position angle: 302
- Last position angle: 300
- First separation: 10.0
- Last separation: 12.1
- Mag first component: 9.3
- Mag second component: 11.2
- Spectral type: K2
- Primary proper motion RA: -11
- Primary proper motion DEC: -7
- Secondary proper motion RA: 0
- Secondary proper motion DEC: -9
- Durchmusterung: +38 3201
- Notes: N D
