21129+3014
- Unique Name: 21129+3014BUP 227AB
- RA: 21 12 56.19
- Dec: +30 13 36.9
- Discoverer: BUP
- Discoverer Number: 227
- Components: AB
- First year: 1900
- Last year: 2012
- Observations: 7
- First position angle: 203
- Last position angle: 206
- First separation: 69.8
- Last separation: 64.8
- Mag first component: 3.3
- Mag second component: 11.7
- Spectral type: G8III
- Primary proper motion RA: 7
- Primary proper motion DEC: -68
- Secondary proper motion RA: -7
- Secondary proper motion DEC: -14
- Durchmusterung: +29 4348
- Notes: N
