21391+1252
- Unique Name: 21391+1252ROE 128
- RA: 21 39 07.47
- Dec: +12 51 43.7
- Discoverer: ROE
- Discoverer Number: 128
- Components:
- First year: 1918
- Last year: 2001
- Observations: 2
- First position angle: 267
- Last position angle: 264
- First separation: 1.2
- Last separation: 1.4
- Mag first component: 10.5
- Mag second component: 10.8
- Spectral type:
- Primary proper motion RA: -33
- Primary proper motion DEC: -14
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung:
- Notes: