21306+4852
- Unique Name: 21306+4852OSO 148AD
- RA: 21 30 37.29
- Dec: +48 51 59.6
- Discoverer: OSO
- Discoverer Number: 148
- Components: AD
- First year: 1952
- Last year: 2003
- Observations: 5
- First position angle: 322
- Last position angle: 341
- First separation: 27.1
- Last separation: 19.8
- Mag first component: 10.67
- Mag second component: 12.25
- Spectral type: sd?G2
- Primary proper motion RA: -199
- Primary proper motion DEC: 53
- Secondary proper motion RA: -2
- Secondary proper motion DEC: -4
- Durchmusterung:
- Notes: N
