21403+0516
- Unique Name: 21403+0516SKF 484
- RA: 21 40 15.46
- Dec: +05 16 25.9
- Discoverer: SKF
- Discoverer Number: 484
- Components:
- First year: 1953
- Last year: 2005
- Observations: 5
- First position angle: 23
- Last position angle: 23
- First separation: 14.9
- Last separation: 15.0
- Mag first component: 13.7
- Mag second component: 17.1
- Spectral type: M4:V
- Primary proper motion RA: -7
- Primary proper motion DEC: -68
- Secondary proper motion RA: -6
- Secondary proper motion DEC: -62
- Durchmusterung:
- Notes: V