02309+2130
- Unique Name: 02309+2130AG 40
- RA: 02 30 56.00
- Dec: +21 30 20.1
- Discoverer: AG
- Discoverer Number: 40
- Components:
- First year: 1893
- Last year: 2004
- Observations: 13
- First position angle: 244
- Last position angle: 246
- First separation: 5.8
- Last separation: 5.6
- Mag first component: 10.5
- Mag second component: 11.5
- Spectral type: G0
- Primary proper motion RA: 42
- Primary proper motion DEC: 12
- Secondary proper motion RA: -5
- Secondary proper motion DEC: -9
- Durchmusterung: +20 410
- Notes: