21564+3156
- Unique Name: 21564+3156HJ 1707
- RA: 21 56 26.52
- Dec: +31 56 42.7
- Discoverer: HJ
- Discoverer Number: 1707
- Components:
- First year: 1828
- Last year: 2011
- Observations: 26
- First position angle: 320
- Last position angle: 351
- First separation: 3.0
- Last separation: 9.5
- Mag first component: 10.63
- Mag second component: 12.3
- Spectral type:
- Primary proper motion RA: -12
- Primary proper motion DEC: -17
- Secondary proper motion RA: 7
- Secondary proper motion DEC: 3
- Durchmusterung:
- Notes: N
