21378+2339
- Unique Name: 21378+2339BKO 489AC
- RA: 21 37 45.43
- Dec: +23 38 40.0
- Discoverer: BKO
- Discoverer Number: 489
- Components: AC
- First year: 2000
- Last year: 2008
- Observations: 3
- First position angle: 119
- Last position angle: 119
- First separation: 7.6
- Last separation: 7.5
- Mag first component: 12.7
- Mag second component: 14.7
- Spectral type:
- Primary proper motion RA: -7
- Primary proper motion DEC: -15
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung:
- Notes: