21220+2727
- Unique Name: 21220+2727OSO 145
- RA: 21 21 57.74
- Dec: +27 27 10.3
- Discoverer: OSO
- Discoverer Number: 145
- Components:
- First year: 1994
- Last year: 2002
- Observations: 5
- First position angle: 4
- Last position angle: 357
- First separation: 13.2
- Last separation: 11.8
- Mag first component: 10.51
- Mag second component: 13.9
- Spectral type: sdG0
- Primary proper motion RA: 204
- Primary proper motion DEC: 154
- Secondary proper motion RA: -1
- Secondary proper motion DEC: -2
- Durchmusterung: +26 4136
- Notes: N
