21207+4923
- Unique Name: 21207+4923ES 820AB
- RA: 21 20 41.96
- Dec: +49 23 03.4
- Discoverer: ES
- Discoverer Number: 820
- Components: AB
- First year: 1900
- Last year: 2012
- Observations: 10
- First position angle: 60
- Last position angle: 60
- First separation: 33.5
- Last separation: 35.3
- Mag first component: 9.33
- Mag second component: 11.61
- Spectral type: F8
- Primary proper motion RA: -9
- Primary proper motion DEC: -11
- Secondary proper motion RA: 25
- Secondary proper motion DEC: -16
- Durchmusterung: +48 3350
- Notes: