21129+3014
- Unique Name: 21129+3014BUP 227AD
- RA: 21 12 56.19
- Dec: +30 13 36.9
- Discoverer: BUP
- Discoverer Number: 227
- Components: AD
- First year: 1835
- Last year: 2012
- Observations: 7
- First position angle: 52
- Last position angle: 63
- First separation: 105.0
- Last separation: 104.5
- Mag first component: 3.3
- Mag second component: 12.7
- Spectral type: G8+III-a
- Primary proper motion RA: 7
- Primary proper motion DEC: -68
- Secondary proper motion RA: 2
- Secondary proper motion DEC: 0
- Durchmusterung:
- Notes: N
