21089+4815
- Unique Name: 21089+4815ARG 42BC
- RA: 21 08 54.44
- Dec: +48 14 59.3
- Discoverer: ARG
- Discoverer Number: 42
- Components: BC
- First year: 1899
- Last year: 2010
- Observations: 11
- First position angle: 304
- Last position angle: 306
- First separation: 44.8
- Last separation: 45.2
- Mag first component: 9.67
- Mag second component: 11.29
- Spectral type: G0
- Primary proper motion RA: -5
- Primary proper motion DEC: -21
- Secondary proper motion RA: -4
- Secondary proper motion DEC: -1
- Durchmusterung: +47 3307
- Notes:
