21129+4820
- Unique Name: 21129+4820HJ 1625
- RA: 21 12 48.44
- Dec: +48 19 34.9
- Discoverer: HJ
- Discoverer Number: 1625
- Components:
- First year: 1828
- Last year: 2003
- Observations: 9
- First position angle: 91
- Last position angle: 72
- First separation: 7.0
- Last separation: 11.6
- Mag first component: 11.28
- Mag second component: 11.5
- Spectral type:
- Primary proper motion RA: 3
- Primary proper motion DEC: -1
- Secondary proper motion RA: 9
- Secondary proper motion DEC: 22
- Durchmusterung: +47 3335
- Notes:
