21511+6401
- Unique Name: 21511+6401STF2842
- RA: 21 51 08.86
- Dec: +64 01 18.0
- Discoverer: STF
- Discoverer Number: 2842
- Components:
- First year: 1828
- Last year: 2010
- Observations: 17
- First position angle: 104
- Last position angle: 102
- First separation: 4.0
- Last separation: 3.5
- Mag first component: 8.26
- Mag second component: 10.75
- Spectral type: B9
- Primary proper motion RA: -13
- Primary proper motion DEC: -1
- Secondary proper motion RA: -4
- Secondary proper motion DEC: -7
- Durchmusterung: +63 1779
- Notes: