20123+3451
- Unique Name: 20123+3451AG 249CD
- RA: 20 12 18.86
- Dec: +34 51 21.8
- Discoverer: AG
- Discoverer Number: 249
- Components: CD
- First year: 2002
- Last year: 2002
- Observations: 1
- First position angle: 351
- Last position angle: 351
- First separation: 6.2
- Last separation: 6.2
- Mag first component: 14.0
- Mag second component: 13.8
- Spectral type:
- Primary proper motion RA: -2
- Primary proper motion DEC: -2
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung:
- Notes: