21591+4001
- Unique Name: 21591+4001MLB1022
- RA: 21 59 02.61
- Dec: +40 01 21.9
- Discoverer: MLB
- Discoverer Number: 1022
- Components:
- First year: 1936
- Last year: 2006
- Observations: 4
- First position angle: 243
- Last position angle: 245
- First separation: 7.3
- Last separation: 8.0
- Mag first component: 12.11
- Mag second component: 14.1
- Spectral type:
- Primary proper motion RA: -7
- Primary proper motion DEC: -11
- Secondary proper motion RA: -11
- Secondary proper motion DEC: -11
- Durchmusterung:
- Notes: