21010+1910
- Unique Name: 21010+1910COU 523
- RA: 21 00 59.96
- Dec: +19 09 32.0
- Discoverer: COU
- Discoverer Number: 523
- Components:
- First year: 1970
- Last year: 2007
- Observations: 4
- First position angle: 98
- Last position angle: 139
- First separation: 0.1
- Last separation: 0.9
- Mag first component: 10.3
- Mag second component: 10.3
- Spectral type: K2
- Primary proper motion RA: 1
- Primary proper motion DEC: -16
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +18 4677
- Notes:
