21039+4138
- Unique Name: 21039+4138STTA214BC
- RA: 21 03 51.70
- Dec: +41 36 44.1
- Discoverer: STT
- Discoverer Number: 0
- Components: BC
- First year: 1911
- Last year: 2002
- Observations: 3
- First position angle: 242
- Last position angle: 244
- First separation: 107.3
- Last separation: 106.4
- Mag first component: 8.64
- Mag second component: 13.23
- Spectral type:
- Primary proper motion RA: -5
- Primary proper motion DEC: -56
- Secondary proper motion RA: -11
- Secondary proper motion DEC: -9
- Durchmusterung: +41 3986
- Notes: N
