21166-2103
- Unique Name: 21166-2103DON1004
- RA: 21 16 34.14
- Dec: -21 02 44.6
- Discoverer: DON
- Discoverer Number: 1004
- Components:
- First year: 1929
- Last year: 1940
- Observations: 2
- First position angle: 279
- Last position angle: 279
- First separation: 0.9
- Last separation: 0.9
- Mag first component: 11.1
- Mag second component: 14.1
- Spectral type:
- Primary proper motion RA: 11
- Primary proper motion DEC: -3
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: -21 5975
- Notes: