21534+4921
- Unique Name: 21534+4921ES 524AB
- RA: 21 53 23.41
- Dec: +49 20 48.8
- Discoverer: ES
- Discoverer Number: 524
- Components: AB
- First year: 1907
- Last year: 2003
- Observations: 5
- First position angle: 189
- Last position angle: 189
- First separation: 20.4
- Last separation: 20.7
- Mag first component: 9.43
- Mag second component: 11.96
- Spectral type: B8
- Primary proper motion RA: -4
- Primary proper motion DEC: -2
- Secondary proper motion RA: -6
- Secondary proper motion DEC: -7
- Durchmusterung: +48 3536
- Notes:
