20509+4123
- Unique Name: 20509+4123LDS2458
- RA: 20 50 56.57
- Dec: +41 22 57.6
- Discoverer: LDS
- Discoverer Number: 2458
- Components:
- First year: 1954
- Last year: 2002
- Observations: 3
- First position angle: 126
- Last position angle: 124
- First separation: 14.0
- Last separation: 14.1
- Mag first component: 9.51
- Mag second component: 15.6
- Spectral type: F0
- Primary proper motion RA: -6
- Primary proper motion DEC: -18
- Secondary proper motion RA: 32
- Secondary proper motion DEC: 1
- Durchmusterung: +40 4337
- Notes: