21590+5511
- Unique Name: 21590+5511STI2604
- RA: 21 58 58.13
- Dec: +55 10 41.1
- Discoverer: STI
- Discoverer Number: 2604
- Components:
- First year: 1906
- Last year: 2003
- Observations: 3
- First position angle: 2
- Last position angle: 7
- First separation: 12.0
- Last separation: 11.6
- Mag first component: 11.7
- Mag second component: 11.7
- Spectral type:
- Primary proper motion RA: 1
- Primary proper motion DEC: 4
- Secondary proper motion RA: 2
- Secondary proper motion DEC: 4
- Durchmusterung:
- Notes: