21040-1807
- Unique Name: 21040-1807BU 1211
- RA: 21 04 01.54
- Dec: -18 06 43.5
- Discoverer: BU
- Discoverer Number: 1211
- Components:
- First year: 1890
- Last year: 2001
- Observations: 15
- First position angle: 345
- Last position angle: 338
- First separation: 0.6
- Last separation: 0.9
- Mag first component: 7.91
- Mag second component: 8.79
- Spectral type: F3IV/V
- Primary proper motion RA: -12
- Primary proper motion DEC: -26
- Secondary proper motion RA: -12
- Secondary proper motion DEC: -26
- Durchmusterung: -18 5849
- Notes: