21584+5245
- Unique Name: 21584+5245ES 1015AB
- RA: 21 58 25.44
- Dec: +52 44 28.4
- Discoverer: ES
- Discoverer Number: 1015
- Components: AB
- First year: 1900
- Last year: 2010
- Observations: 11
- First position angle: 250
- Last position angle: 239
- First separation: 4.6
- Last separation: 7.9
- Mag first component: 10.51
- Mag second component: 10.83
- Spectral type:
- Primary proper motion RA: 17
- Primary proper motion DEC: -4
- Secondary proper motion RA: -13
- Secondary proper motion DEC: -25
- Durchmusterung: +52 3072
- Notes: L
