21099+3659
- Unique Name: 21099+3659SEI1422
- RA: 21 09 52.66
- Dec: +36 59 10.2
- Discoverer: SEI
- Discoverer Number: 1422
- Components:
- First year: 1895
- Last year: 2005
- Observations: 14
- First position angle: 359
- Last position angle: 334
- First separation: 23.8
- Last separation: 20.8
- Mag first component: 8.98
- Mag second component: 10.7
- Spectral type: F8
- Primary proper motion RA: 78
- Primary proper motion DEC: 47
- Secondary proper motion RA: 0
- Secondary proper motion DEC: -6
- Durchmusterung: +36 4437
- Notes: