21240+2445
- Unique Name: 21240+2445COU 231
- RA: 21 23 58.98
- Dec: +24 45 23.4
- Discoverer: COU
- Discoverer Number: 231
- Components:
- First year: 1967
- Last year: 2007
- Observations: 7
- First position angle: 113
- Last position angle: 121
- First separation: 0.3
- Last separation: 0.5
- Mag first component: 9.9
- Mag second component: 10.6
- Spectral type: G0
- Primary proper motion RA: 30
- Primary proper motion DEC: 2
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +24 4393
- Notes:
