21573-3418
- Unique Name: 21573-3418HDS3121AB
- RA: 21 57 17.20
- Dec: -34 18 21.4
- Discoverer: HDS
- Discoverer Number: 3121
- Components: AB
- First year: 1991
- Last year: 1991
- Observations: 2
- First position angle: 109
- Last position angle: 112
- First separation: 1.0
- Last separation: 1.0
- Mag first component: 10.79
- Mag second component: 12.15
- Spectral type: K5V
- Primary proper motion RA: 7
- Primary proper motion DEC: -41
- Secondary proper motion RA: 15
- Secondary proper motion DEC: -45
- Durchmusterung: -3415340
- Notes: