21591+6400
- Unique Name: 21591+6400STI1077AB,D
- RA: 21 59 03.72
- Dec: +63 59 55.3
- Discoverer: STI
- Discoverer Number: 1077
- Components: AB,D
- First year: 1912
- Last year: 2012
- Observations: 8
- First position angle: 146
- Last position angle: 145
- First separation: 8.4
- Last separation: 8.3
- Mag first component: 8.9
- Mag second component: 12.67
- Spectral type: B8V
- Primary proper motion RA: -9
- Primary proper motion DEC: 0
- Secondary proper motion RA: -2
- Secondary proper motion DEC: -1
- Durchmusterung:
- Notes: