21555+2942
- Unique Name: 21555+2942HO 609AB
- RA: 21 55 12.36
- Dec: +29 43 34.6
- Discoverer: HO
- Discoverer Number: 609
- Components: AB
- First year: 1893
- Last year: 2012
- Observations: 23
- First position angle: 356
- Last position angle: 177
- First separation: 1.8
- Last separation: 3.2
- Mag first component: 11.5
- Mag second component: 11.8
- Spectral type:
- Primary proper motion RA: -18
- Primary proper motion DEC: 16
- Secondary proper motion RA: -14
- Secondary proper motion DEC: -8
- Durchmusterung:
- Notes: N
