21408-5742
- Unique Name: 21408-5742UC 4523
- RA: 21 40 50.42
- Dec: -57 42 18.7
- Discoverer: UC
- Discoverer Number: 4523
- Components:
- First year: 1998
- Last year: 2000
- Observations: 2
- First position angle: 226
- Last position angle: 226
- First separation: 34.4
- Last separation: 34.4
- Mag first component: 12.27
- Mag second component: 13.99
- Spectral type:
- Primary proper motion RA: 35
- Primary proper motion DEC: -49
- Secondary proper motion RA: 36
- Secondary proper motion DEC: -50
- Durchmusterung:
- Notes: V