21129+3619
- Unique Name: 21129+3619SEI1450
- RA: 21 12 57.14
- Dec: +36 18 49.4
- Discoverer: SEI
- Discoverer Number: 1450
- Components:
- First year: 1896
- Last year: 2002
- Observations: 7
- First position angle: 172
- Last position angle: 169
- First separation: 19.1
- Last separation: 17.9
- Mag first component: 11.43
- Mag second component: 11.4
- Spectral type:
- Primary proper motion RA: -6
- Primary proper motion DEC: -8
- Secondary proper motion RA: 0
- Secondary proper motion DEC: 2
- Durchmusterung:
- Notes: