21257+3824
- Unique Name: 21257+3824TDT2955
- RA: 21 25 39.50
- Dec: +38 24 29.7
- Discoverer: TDT
- Discoverer Number: 2955
- Components:
- First year: 1991
- Last year: 1991
- Observations: 1
- First position angle: 18
- Last position angle: 18
- First separation: 0.5
- Last separation: 0.5
- Mag first component: 11.6
- Mag second component: 11.71
- Spectral type:
- Primary proper motion RA: -3
- Primary proper motion DEC: -10
- Secondary proper motion RA: -3
- Secondary proper motion DEC: -10
- Durchmusterung:
- Notes: