21423+0555
- Unique Name: 21423+0555HU 280
- RA: 21 42 18.45
- Dec: +05 54 43.0
- Discoverer: HU
- Discoverer Number: 280
- Components:
- First year: 1900
- Last year: 2006
- Observations: 71
- First position angle: 318
- Last position angle: 175
- First separation: 0.2
- Last separation: 0.2
- Mag first component: 8.33
- Mag second component: 8.5
- Spectral type: A5
- Primary proper motion RA: 13
- Primary proper motion DEC: 23
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +05 4851
- Notes: NO
