21008-4123
- Unique Name: 21008-4123B 513
- RA: 21 00 48.32
- Dec: -41 22 20.3
- Discoverer: B
- Discoverer Number: 513
- Components:
- First year: 1925
- Last year: 1999
- Observations: 6
- First position angle: 29
- Last position angle: 30
- First separation: 3.8
- Last separation: 3.8
- Mag first component: 10.68
- Mag second component: 11.44
- Spectral type: F6/7V
- Primary proper motion RA: -20
- Primary proper motion DEC: -31
- Secondary proper motion RA: 40
- Secondary proper motion DEC: 72
- Durchmusterung: -4114333
- Notes: