21187+2240
- Unique Name: 21187+2240UC 4439
- RA: 21 18 44.66
- Dec: +22 40 29.0
- Discoverer: UC
- Discoverer Number: 4439
- Components:
- First year: 1999
- Last year: 2001
- Observations: 2
- First position angle: 223
- Last position angle: 223
- First separation: 9.8
- Last separation: 9.7
- Mag first component: 14.4
- Mag second component: 15.5
- Spectral type:
- Primary proper motion RA: 36
- Primary proper motion DEC: -49
- Secondary proper motion RA: 20
- Secondary proper motion DEC: -57
- Durchmusterung:
- Notes: V
