21531-1831
- Unique Name: 21531-1831ARA 504
- RA: 21 53 05.19
- Dec: -18 31 16.1
- Discoverer: ARA
- Discoverer Number: 504
- Components:
- First year: 1916
- Last year: 1999
- Observations: 6
- First position angle: 35
- Last position angle: 34
- First separation: 5.3
- Last separation: 5.6
- Mag first component: 12.4
- Mag second component: 12.6
- Spectral type:
- Primary proper motion RA: -12
- Primary proper motion DEC: -86
- Secondary proper motion RA: 34
- Secondary proper motion DEC: -13
- Durchmusterung:
- Notes: