20421+5436
- Unique Name: 20421+5436ES 994
- RA: 20 42 10.47
- Dec: +54 35 48.8
- Discoverer: ES
- Discoverer Number: 994
- Components:
- First year: 1910
- Last year: 2011
- Observations: 2
- First position angle: 12
- Last position angle: 14
- First separation: 5.8
- Last separation: 4.8
- Mag first component: 10.36
- Mag second component: 12.5
- Spectral type: F8
- Primary proper motion RA: 7
- Primary proper motion DEC: 7
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +54 2404
- Notes: