21550+5540
- Unique Name: 21550+5540STI2600
- RA: 21 54 57.47
- Dec: +55 40 45.3
- Discoverer: STI
- Discoverer Number: 2600
- Components:
- First year: 1917
- Last year: 2012
- Observations: 4
- First position angle: 107
- Last position angle: 110
- First separation: 4.4
- Last separation: 4.1
- Mag first component: 12.7
- Mag second component: 12.7
- Spectral type:
- Primary proper motion RA: -26
- Primary proper motion DEC: 11
- Secondary proper motion RA: 7
- Secondary proper motion DEC: -1
- Durchmusterung:
- Notes:
