21135+0713
- Unique Name: 21135+0713BU 270AB
- RA: 21 13 27.24
- Dec: +07 13 04.9
- Discoverer: BU
- Discoverer Number: 270
- Components: AB
- First year: 1875
- Last year: 2008
- Observations: 45
- First position angle: 355
- Last position angle: 347
- First separation: 0.6
- Last separation: 0.6
- Mag first component: 7.42
- Mag second component: 9.4
- Spectral type: A7V
- Primary proper motion RA: 28
- Primary proper motion DEC: -10
- Secondary proper motion RA: 28
- Secondary proper motion DEC: -10
- Durchmusterung: +06 4776
- Notes: NO
