21047+3710
- Unique Name: 21047+3710HDS3003
- RA: 21 04 40.78
- Dec: +37 09 47.2
- Discoverer: HDS
- Discoverer Number: 3003
- Components:
- First year: 1991
- Last year: 1991
- Observations: 2
- First position angle: 283
- Last position angle: 283
- First separation: 1.4
- Last separation: 1.4
- Mag first component: 8.92
- Mag second component: 12.18
- Spectral type: K0
- Primary proper motion RA: 15
- Primary proper motion DEC: 0
- Secondary proper motion RA: 14
- Secondary proper motion DEC: 3
- Durchmusterung: +36 4390
- Notes: