21231+3647
- Unique Name: 21231+3647ES 2124
- RA: 21 23 15.47
- Dec: +36 46 39.9
- Discoverer: ES
- Discoverer Number: 2124
- Components:
- First year: 1924
- Last year: 2011
- Observations: 4
- First position angle: 269
- Last position angle: 264
- First separation: 6.5
- Last separation: 7.7
- Mag first component: 10.2
- Mag second component: 12.6
- Spectral type:
- Primary proper motion RA: 1
- Primary proper motion DEC: 1
- Secondary proper motion RA: -9
- Secondary proper motion DEC: -6
- Durchmusterung: +36 4536
- Notes: R
