21102+3923
- Unique Name: 21102+3923ALI 963
- RA: 21 10 11.98
- Dec: +39 23 45.0
- Discoverer: ALI
- Discoverer Number: 963
- Components:
- First year: 1928
- Last year: 2002
- Observations: 3
- First position angle: 297
- Last position angle: 292
- First separation: 6.7
- Last separation: 6.9
- Mag first component: 12.4
- Mag second component: 12.6
- Spectral type:
- Primary proper motion RA: 8
- Primary proper motion DEC: -7
- Secondary proper motion RA: 2
- Secondary proper motion DEC: -13
- Durchmusterung:
- Notes: