21121+3539
- Unique Name: 21121+3539SEI1441
- RA: 21 12 03.47
- Dec: +35 38 37.9
- Discoverer: SEI
- Discoverer Number: 1441
- Components:
- First year: 1896
- Last year: 2012
- Observations: 5
- First position angle: 153
- Last position angle: 158
- First separation: 13.9
- Last separation: 14.1
- Mag first component: 10.44
- Mag second component: 11.9
- Spectral type:
- Primary proper motion RA: -2
- Primary proper motion DEC: -2
- Secondary proper motion RA: -7
- Secondary proper motion DEC: -6
- Durchmusterung:
- Notes: