21538+6237
- Unique Name: 21538+6237ES 144AD
- RA: 21 53 48.11
- Dec: +62 36 51.9
- Discoverer: ES
- Discoverer Number: 144
- Components: AD
- First year: 1898
- Last year: 2011
- Observations: 3
- First position angle: 41
- Last position angle: 43
- First separation: 23.0
- Last separation: 23.6
- Mag first component: 7.07
- Mag second component: 12.0
- Spectral type: B1V
- Primary proper motion RA: -5
- Primary proper motion DEC: -2
- Secondary proper motion RA: 6
- Secondary proper motion DEC: -3
- Durchmusterung: +61 2217
- Notes: NU
