21189+4102
- Unique Name: 21189+4102HO 601AC
- RA: 21 18 55.32
- Dec: +41 02 25.9
- Discoverer: HO
- Discoverer Number: 601
- Components: AC
- First year: 1895
- Last year: 2002
- Observations: 3
- First position angle: 82
- Last position angle: 82
- First separation: 56.0
- Last separation: 56.8
- Mag first component: 6.18
- Mag second component: 12.64
- Spectral type: A5IV
- Primary proper motion RA: -5
- Primary proper motion DEC: -5
- Secondary proper motion RA: -3
- Secondary proper motion DEC: -13
- Durchmusterung:
- Notes: