21129+3014
- Unique Name: 21129+3014BUP 227AC
- RA: 21 12 56.19
- Dec: +30 13 36.9
- Discoverer: BUP
- Discoverer Number: 227
- Components: AC
- First year: 1907
- Last year: 2012
- Observations: 6
- First position angle: 300
- Last position angle: 300
- First separation: 90.4
- Last separation: 91.6
- Mag first component: 3.3
- Mag second component: 12.73
- Spectral type: G8+III-a
- Primary proper motion RA: 7
- Primary proper motion DEC: -68
- Secondary proper motion RA: -12
- Secondary proper motion DEC: -41
- Durchmusterung:
- Notes: N
