21431+2157
- Unique Name: 21431+2157BRT2499
- RA: 21 43 06.40
- Dec: +21 57 16.9
- Discoverer: BRT
- Discoverer Number: 2499
- Components:
- First year: 1938
- Last year: 2006
- Observations: 6
- First position angle: 188
- Last position angle: 205
- First separation: 3.0
- Last separation: 4.6
- Mag first component: 10.0
- Mag second component: 10.8
- Spectral type:
- Primary proper motion RA: 18
- Primary proper motion DEC: 16
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung:
- Notes:
