21211+5323
- Unique Name: 21211+5323ES 139
- RA: 21 21 08.63
- Dec: +53 22 29.1
- Discoverer: ES
- Discoverer Number: 139
- Components:
- First year: 1897
- Last year: 2010
- Observations: 13
- First position angle: 1
- Last position angle: 351
- First separation: 6.0
- Last separation: 5.7
- Mag first component: 10.07
- Mag second component: 11.6
- Spectral type: F0
- Primary proper motion RA: 0
- Primary proper motion DEC: -18
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +52 2921
- Notes: