21240+2352
- Unique Name: 21240+2352J 3137
- RA: 21 23 53.95
- Dec: +23 51 22.0
- Discoverer: J
- Discoverer Number: 3137
- Components:
- First year: 1944
- Last year: 2009
- Observations: 4
- First position angle: 235
- Last position angle: 239
- First separation: 5.0
- Last separation: 7.2
- Mag first component: 11.2
- Mag second component: 11.5
- Spectral type:
- Primary proper motion RA: 11
- Primary proper motion DEC: -5
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung:
- Notes:
