21576+6842
- Unique Name: 21576+6842HAU 28
- RA: 21 57 38.70
- Dec: +68 41 46.0
- Discoverer: HAU
- Discoverer Number: 28
- Components:
- First year: 1894
- Last year: 2010
- Observations: 11
- First position angle: 42
- Last position angle: 36
- First separation: 36.8
- Last separation: 35.5
- Mag first component: 8.39
- Mag second component: 8.9
- Spectral type: K2
- Primary proper motion RA: 25
- Primary proper motion DEC: -11
- Secondary proper motion RA: -3
- Secondary proper motion DEC: -5
- Durchmusterung: +68 1263
- Notes: