21175+1221
- Unique Name: 21175+1221HJ 279AC
- RA: 21 17 40.60
- Dec: +12 20 34.1
- Discoverer: HJ
- Discoverer Number: 279
- Components: AC
- First year: 1907
- Last year: 2013
- Observations: 7
- First position angle: 294
- Last position angle: 293
- First separation: 124.7
- Last separation: 126.7
- Mag first component: 11.49
- Mag second component: 9.17
- Spectral type:
- Primary proper motion RA: 39
- Primary proper motion DEC: -23
- Secondary proper motion RA: -22
- Secondary proper motion DEC: -12
- Durchmusterung:
- Notes: N
