21308+4827
- Unique Name: 21308+4827A 770AB
- RA: 21 30 48.00
- Dec: +48 27 25.4
- Discoverer: A
- Discoverer Number: 770
- Components: AB
- First year: 1928
- Last year: 1989
- Observations: 8
- First position angle: 326
- Last position angle: 143
- First separation: 0.3
- Last separation: 0.2
- Mag first component: 7.99
- Mag second component: 7.99
- Spectral type: K0
- Primary proper motion RA: 18
- Primary proper motion DEC: -142
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +47 3439
- Notes: N
