21366+3928
- Unique Name: 21366+3928VYS 10
- RA: 21 36 38.58
- Dec: +39 27 20.5
- Discoverer: VYS
- Discoverer Number: 10
- Components:
- First year: 1959
- Last year: 2008
- Observations: 23
- First position angle: 295
- Last position angle: 271
- First separation: 2.7
- Last separation: 1.2
- Mag first component: 10.41
- Mag second component: 12.17
- Spectral type: M0V
- Primary proper motion RA: -190
- Primary proper motion DEC: -169
- Secondary proper motion RA: -181
- Secondary proper motion DEC: -167
- Durchmusterung:
- Notes: NV
