21176+2841
- Unique Name: 21176+2841MLB 489AC
- RA: 21 17 38.12
- Dec: +28 40 46.1
- Discoverer: MLB
- Discoverer Number: 489
- Components: AC
- First year: 1926
- Last year: 2012
- Observations: 5
- First position angle: 282
- Last position angle: 284
- First separation: 9.4
- Last separation: 10.5
- Mag first component: 10.32
- Mag second component: 12.0
- Spectral type:
- Primary proper motion RA: -3
- Primary proper motion DEC: -7
- Secondary proper motion RA: -24
- Secondary proper motion DEC: -6
- Durchmusterung:
- Notes: N
