21023+3931
- Unique Name: 21023+3931H 4 113AC
- RA: 21 02 20.96
- Dec: +39 30 32.5
- Discoverer: H 4
- Discoverer Number: 113
- Components: AC
- First year: 1876
- Last year: 2012
- Observations: 10
- First position angle: 270
- Last position angle: 248
- First separation: 20.0
- Last separation: 26.7
- Mag first component: 6.62
- Mag second component: 12.5
- Spectral type: K3II-III
- Primary proper motion RA: 2
- Primary proper motion DEC: 1
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung:
- Notes: N
