21117+3621
- Unique Name: 21117+3621SEI1439
- RA: 21 11 45.09
- Dec: +36 20 20.0
- Discoverer: SEI
- Discoverer Number: 1439
- Components:
- First year: 1896
- Last year: 2002
- Observations: 4
- First position angle: 194
- Last position angle: 195
- First separation: 24.9
- Last separation: 26.4
- Mag first component: 11.45
- Mag second component: 11.8
- Spectral type:
- Primary proper motion RA: 3
- Primary proper motion DEC: -4
- Secondary proper motion RA: -13
- Secondary proper motion DEC: -12
- Durchmusterung:
- Notes: