21133+1655
- Unique Name: 21133+1655BU 681
- RA: 21 13 16.58
- Dec: +16 55 08.4
- Discoverer: BU
- Discoverer Number: 681
- Components:
- First year: 1878
- Last year: 1991
- Observations: 16
- First position angle: 240
- Last position angle: 243
- First separation: 2.5
- Last separation: 2.8
- Mag first component: 7.48
- Mag second component: 10.92
- Spectral type: K3III
- Primary proper motion RA: -19
- Primary proper motion DEC: 4
- Secondary proper motion RA: -20
- Secondary proper motion DEC: 6
- Durchmusterung: +16 4475
- Notes: