21558+3716
- Unique Name: 21558+3716HO 174AC
- RA: 21 55 48.33
- Dec: +37 15 54.1
- Discoverer: HO
- Discoverer Number: 174
- Components: AC
- First year: 1881
- Last year: 2011
- Observations: 11
- First position angle: 227
- Last position angle: 226
- First separation: 161.4
- Last separation: 160.5
- Mag first component: 10.38
- Mag second component: 12.7
- Spectral type: F2
- Primary proper motion RA: -7
- Primary proper motion DEC: -16
- Secondary proper motion RA: -26
- Secondary proper motion DEC: -10
- Durchmusterung:
- Notes: N
