21306+0710
- Unique Name: 21306+0710HU 277
- RA: 21 30 36.02
- Dec: +07 10 25.4
- Discoverer: HU
- Discoverer Number: 277
- Components:
- First year: 1900
- Last year: 1996
- Observations: 6
- First position angle: 109
- Last position angle: 102
- First separation: 1.1
- Last separation: 1.1
- Mag first component: 7.92
- Mag second component: 10.85
- Spectral type: G0
- Primary proper motion RA: -18
- Primary proper motion DEC: -11
- Secondary proper motion RA: -15
- Secondary proper motion DEC: -8
- Durchmusterung: +06 4842
- Notes: