21023+3931
- Unique Name: 21023+3931WRD 4AF
- RA: 21 02 20.96
- Dec: +39 30 32.5
- Discoverer: WRD
- Discoverer Number: 4
- Components: AF
- First year: 1875
- Last year: 2012
- Observations: 4
- First position angle: 230
- Last position angle: 222
- First separation: 95.0
- Last separation: 102.2
- Mag first component: 6.62
- Mag second component: 12.45
- Spectral type: K3II-III
- Primary proper motion RA: 2
- Primary proper motion DEC: 1
- Secondary proper motion RA: -12
- Secondary proper motion DEC: -13
- Durchmusterung:
- Notes: N
