21516+6545
- Unique Name: 21516+6545STF2843AB
- RA: 21 51 37.25
- Dec: +65 45 09.9
- Discoverer: STF
- Discoverer Number: 2843
- Components: AB
- First year: 1828
- Last year: 2011
- Observations: 151
- First position angle: 136
- Last position angle: 150
- First separation: 2.5
- Last separation: 1.3
- Mag first component: 7.01
- Mag second component: 7.28
- Spectral type: A1m
- Primary proper motion RA: -10
- Primary proper motion DEC: -19
- Secondary proper motion RA: -10
- Secondary proper motion DEC: -19
- Durchmusterung: +65 1664
- Notes: N D
