21377+5734
- Unique Name: 21377+5734D 25AB
- RA: 21 37 40.93
- Dec: +57 33 37.5
- Discoverer: D
- Discoverer Number: 25
- Components: AB
- First year: 1867
- Last year: 2005
- Observations: 17
- First position angle: 151
- Last position angle: 161
- First separation: 0.9
- Last separation: 0.9
- Mag first component: 8.65
- Mag second component: 10.04
- Spectral type: A0
- Primary proper motion RA: -7
- Primary proper motion DEC: -3
- Secondary proper motion RA: -7
- Secondary proper motion DEC: -3
- Durchmusterung: +56 2610
- Notes: