21031+2929
- Unique Name: 21031+2929OSO 139AB
- RA: 21 03 06.12
- Dec: +29 28 56.2
- Discoverer: OSO
- Discoverer Number: 139
- Components: AB
- First year: 1994
- Last year: 1998
- Observations: 3
- First position angle: 85
- Last position angle: 82
- First separation: 14.8
- Last separation: 15.8
- Mag first component: 10.19
- Mag second component: 18.0
- Spectral type:
- Primary proper motion RA: -261
- Primary proper motion DEC: -169
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +28 3971
- Notes: N
