20120+3640
- Unique Name: 20120+3640SEI 989
- RA: 20 12 01.13
- Dec: +36 40 00.1
- Discoverer: SEI
- Discoverer Number: 989
- Components:
- First year: 1896
- Last year: 2002
- Observations: 5
- First position angle: 152
- Last position angle: 153
- First separation: 29.6
- Last separation: 29.4
- Mag first component: 11.27
- Mag second component: 11.41
- Spectral type:
- Primary proper motion RA: -3
- Primary proper motion DEC: -6
- Secondary proper motion RA: -12
- Secondary proper motion DEC: -8
- Durchmusterung:
- Notes: