21573+5029
- Unique Name: 21573+5029HDS3120
- RA: 21 57 17.91
- Dec: +50 29 22.1
- Discoverer: HDS
- Discoverer Number: 3120
- Components:
- First year: 1991
- Last year: 1991
- Observations: 2
- First position angle: 190
- Last position angle: 190
- First separation: 0.9
- Last separation: 0.9
- Mag first component: 7.52
- Mag second component: 10.81
- Spectral type: K3II-III
- Primary proper motion RA: 2
- Primary proper motion DEC: 1
- Secondary proper motion RA: 2
- Secondary proper motion DEC: -1
- Durchmusterung: +49 3692
- Notes: