21121+1038
- Unique Name: 21121+1038BUP 226BC
- RA: 21 12 05.74
- Dec: +10 41 19.6
- Discoverer: BUP
- Discoverer Number: 226
- Components: BC
- First year: 1908
- Last year: 2002
- Observations: 4
- First position angle: 31
- Last position angle: 32
- First separation: 19.5
- Last separation: 24.3
- Mag first component: 10.08
- Mag second component: 13.38
- Spectral type: G5
- Primary proper motion RA: -25
- Primary proper motion DEC: -40
- Secondary proper motion RA: -2
- Secondary proper motion DEC: 2
- Durchmusterung: +10 4480
- Notes: