21174+2135
- Unique Name: 21174+2135COU 228
- RA: 21 17 25.12
- Dec: +21 35 01.1
- Discoverer: COU
- Discoverer Number: 228
- Components:
- First year: 1967
- Last year: 2007
- Observations: 2
- First position angle: 54
- Last position angle: 47
- First separation: 0.7
- Last separation: 0.7
- Mag first component: 11.2
- Mag second component: 12.5
- Spectral type: F8
- Primary proper motion RA: -4
- Primary proper motion DEC: -14
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +20 4873
- Notes: