21358+3101
- Unique Name: 21358+3101HJ 939AB
- RA: 21 35 45.74
- Dec: +31 00 34.9
- Discoverer: HJ
- Discoverer Number: 939
- Components: AB
- First year: 1827
- Last year: 2002
- Observations: 6
- First position angle: 170
- Last position angle: 175
- First separation: 6.0
- Last separation: 14.9
- Mag first component: 8.06
- Mag second component: 12.78
- Spectral type: K1V
- Primary proper motion RA: 25
- Primary proper motion DEC: 11
- Secondary proper motion RA: 31
- Secondary proper motion DEC: -14
- Durchmusterung: +30 4479
- Notes: U
