20309+3459
- Unique Name: 20309+3459SEI1145
- RA: 20 30 52.56
- Dec: +34 59 15.1
- Discoverer: SEI
- Discoverer Number: 1145
- Components:
- First year: 1896
- Last year: 2002
- Observations: 5
- First position angle: 88
- Last position angle: 88
- First separation: 7.7
- Last separation: 7.7
- Mag first component: 10.5
- Mag second component: 10.5
- Spectral type:
- Primary proper motion RA: -4
- Primary proper motion DEC: -3
- Secondary proper motion RA: -2
- Secondary proper motion DEC: -3
- Durchmusterung:
- Notes: