21054+0557
- Unique Name: 21054+0557BUP 224
- RA: 21 05 26.73
- Dec: +05 57 29.4
- Discoverer: BUP
- Discoverer Number: 224
- Components:
- First year: 1911
- Last year: 2012
- Observations: 8
- First position angle: 275
- Last position angle: 301
- First separation: 35.6
- Last separation: 30.7
- Mag first component: 5.94
- Mag second component: 12.4
- Spectral type: F8V
- Primary proper motion RA: -129
- Primary proper motion DEC: -114
- Secondary proper motion RA: -10
- Secondary proper motion DEC: -14
- Durchmusterung: +05 4697
- Notes: NL
