21577+4356
- Unique Name: 21577+4356J 3155AC
- RA: 21 57 41.80
- Dec: +43 55 41.0
- Discoverer: J
- Discoverer Number: 3155
- Components: AC
- First year: 1944
- Last year: 2002
- Observations: 3
- First position angle: 335
- Last position angle: 348
- First separation: 10.0
- Last separation: 9.8
- Mag first component: 12.2
- Mag second component: 15.0
- Spectral type:
- Primary proper motion RA: -6
- Primary proper motion DEC: 8
- Secondary proper motion RA: -27
- Secondary proper motion DEC: 88
- Durchmusterung:
- Notes: