21187+3348
- Unique Name: 21187+3348HU 770
- RA: 21 18 42.87
- Dec: +33 47 44.6
- Discoverer: HU
- Discoverer Number: 770
- Components:
- First year: 1904
- Last year: 2009
- Observations: 11
- First position angle: 307
- Last position angle: 312
- First separation: 1.0
- Last separation: 0.9
- Mag first component: 10.26
- Mag second component: 10.71
- Spectral type: F5
- Primary proper motion RA: 16
- Primary proper motion DEC: 4
- Secondary proper motion RA: 16
- Secondary proper motion DEC: 4
- Durchmusterung: +33 4223
- Notes: