21040+2340
- Unique Name: 21040+2340POU5120
- RA: 21 04 01.55
- Dec: +23 40 16.9
- Discoverer: POU
- Discoverer Number: 5120
- Components:
- First year: 1898
- Last year: 2008
- Observations: 4
- First position angle: 218
- Last position angle: 221
- First separation: 7.1
- Last separation: 6.6
- Mag first component: 12.6
- Mag second component: 13.5
- Spectral type:
- Primary proper motion RA: 1
- Primary proper motion DEC: 3
- Secondary proper motion RA: -1
- Secondary proper motion DEC: 0
- Durchmusterung:
- Notes: