21128+2516
- Unique Name: 21128+2516POU5251
- RA: 21 12 46.44
- Dec: +25 15 23.5
- Discoverer: POU
- Discoverer Number: 5251
- Components:
- First year: 1898
- Last year: 2009
- Observations: 4
- First position angle: 306
- Last position angle: 303
- First separation: 16.7
- Last separation: 18.3
- Mag first component: 11.2
- Mag second component: 13.8
- Spectral type:
- Primary proper motion RA: 11
- Primary proper motion DEC: -1
- Secondary proper motion RA: -8
- Secondary proper motion DEC: 9
- Durchmusterung:
- Notes: