21457+2957
- Unique Name: 21457+2957TDT3145
- RA: 21 45 40.55
- Dec: +29 56 38.1
- Discoverer: TDT
- Discoverer Number: 3145
- Components:
- First year: 1991
- Last year: 1991
- Observations: 1
- First position angle: 250
- Last position angle: 250
- First separation: 2.2
- Last separation: 2.2
- Mag first component: 12.1
- Mag second component: 12.67
- Spectral type:
- Primary proper motion RA: -15
- Primary proper motion DEC: -7
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung:
- Notes:
