21189+4102
- Unique Name: 21189+4102HO 601AB
- RA: 21 18 55.32
- Dec: +41 02 25.9
- Discoverer: HO
- Discoverer Number: 601
- Components: AB
- First year: 1895
- Last year: 2002
- Observations: 7
- First position angle: 181
- Last position angle: 176
- First separation: 17.1
- Last separation: 16.5
- Mag first component: 6.2
- Mag second component: 12.7
- Spectral type: A5IV
- Primary proper motion RA: -5
- Primary proper motion DEC: -5
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +40 4485
- Notes: