21409+3122
- Unique Name: 21409+3122AG 275
- RA: 21 40 53.07
- Dec: +31 22 21.2
- Discoverer: AG
- Discoverer Number: 275
- Components:
- First year: 1895
- Last year: 2011
- Observations: 7
- First position angle: 13
- Last position angle: 13
- First separation: 10.7
- Last separation: 10.9
- Mag first component: 10.76
- Mag second component: 11.3
- Spectral type: F5
- Primary proper motion RA: 8
- Primary proper motion DEC: 8
- Secondary proper motion RA: 9
- Secondary proper motion DEC: 12
- Durchmusterung: +30 4501
- Notes: