21209+4010
- Unique Name: 21209+4010UC 259
- RA: 21 20 52.28
- Dec: +40 09 49.8
- Discoverer: UC
- Discoverer Number: 259
- Components:
- First year: 1999
- Last year: 2002
- Observations: 2
- First position angle: 109
- Last position angle: 109
- First separation: 54.8
- Last separation: 54.6
- Mag first component: 13.38
- Mag second component: 13.98
- Spectral type:
- Primary proper motion RA: 88
- Primary proper motion DEC: 66
- Secondary proper motion RA: 85
- Secondary proper motion DEC: 58
- Durchmusterung:
- Notes: V
