15404+2123
- Unique Name: 15404+2123HU 579
- RA: 15 40 23.68
- Dec: +21 22 43.4
- Discoverer: HU
- Discoverer Number: 579
- Components:
- First year: 1902
- Last year: 2009
- Observations: 10
- First position angle: 129
- Last position angle: 137
- First separation: 0.6
- Last separation: 0.7
- Mag first component: 9.02
- Mag second component: 9.37
- Spectral type: K0
- Primary proper motion RA: -25
- Primary proper motion DEC: 18
- Secondary proper motion RA: -25
- Secondary proper motion DEC: 18
- Durchmusterung: +21 2802
- Notes: