20028+3742
- Unique Name: 20028+3742SEI 817
- RA: 20 02 49.34
- Dec: +37 42 00.4
- Discoverer: SEI
- Discoverer Number: 817
- Components:
- First year: 1896
- Last year: 2002
- Observations: 5
- First position angle: 96
- Last position angle: 101
- First separation: 23.4
- Last separation: 21.7
- Mag first component: 10.02
- Mag second component: 12.2
- Spectral type: B
- Primary proper motion RA: -5
- Primary proper motion DEC: -8
- Secondary proper motion RA: -20
- Secondary proper motion DEC: -32
- Durchmusterung: +37 3736
- Notes: