21005+1920
- Unique Name: 21005+1920BU 1497
- RA: 21 00 27.69
- Dec: +19 19 46.5
- Discoverer: BU
- Discoverer Number: 1497
- Components:
- First year: 1880
- Last year: 2011
- Observations: 20
- First position angle: 333
- Last position angle: 337
- First separation: 44.7
- Last separation: 49.8
- Mag first component: 5.89
- Mag second component: 10.0
- Spectral type: M3IIIab
- Primary proper motion RA: -15
- Primary proper motion DEC: -59
- Secondary proper motion RA: -7
- Secondary proper motion DEC: -16
- Durchmusterung: +18 4675
- Notes: N
