21509-4052
- Unique Name: 21509-4052CRU 2AC
- RA: 21 50 56.33
- Dec: -40 51 57.1
- Discoverer: CRU
- Discoverer Number: 2
- Components: AC
- First year: 1879
- Last year: 2011
- Observations: 7
- First position angle: 41
- Last position angle: 48
- First separation: 38.5
- Last separation: 58.2
- Mag first component: 9.9
- Mag second component: 12.2
- Spectral type: G3V
- Primary proper motion RA: -100
- Primary proper motion DEC: -55
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung:
- Notes: N
