21561+4506
- Unique Name: 21561+4506BRT1155
- RA: 21 56 05.43
- Dec: +45 06 31.3
- Discoverer: BRT
- Discoverer Number: 1155
- Components:
- First year: 1895
- Last year: 2002
- Observations: 4
- First position angle: 94
- Last position angle: 101
- First separation: 3.9
- Last separation: 4.2
- Mag first component: 10.8
- Mag second component: 11.1
- Spectral type:
- Primary proper motion RA: -5
- Primary proper motion DEC: -4
- Secondary proper motion RA: 20
- Secondary proper motion DEC: -12
- Durchmusterung:
- Notes: