21523+6306
- Unique Name: 21523+6306STF2845AB
- RA: 21 52 20.95
- Dec: +63 06 04.5
- Discoverer: STF
- Discoverer Number: 2845
- Components: AB
- First year: 1828
- Last year: 2009
- Observations: 37
- First position angle: 172
- Last position angle: 173
- First separation: 2.0
- Last separation: 2.0
- Mag first component: 8.07
- Mag second component: 8.2
- Spectral type: B2V
- Primary proper motion RA: 0
- Primary proper motion DEC: -1
- Secondary proper motion RA: 0
- Secondary proper motion DEC: -1
- Durchmusterung: +62 1992
- Notes: