21299+5256
- Unique Name: 21299+5256STF2803AB
- RA: 21 29 52.95
- Dec: +52 56 01.8
- Discoverer: STF
- Discoverer Number: 2803
- Components: AB
- First year: 1832
- Last year: 2012
- Observations: 29
- First position angle: 290
- Last position angle: 285
- First separation: 22.2
- Last separation: 25.7
- Mag first component: 7.24
- Mag second component: 9.6
- Spectral type: B9.5IV-V
- Primary proper motion RA: 6
- Primary proper motion DEC: 4
- Secondary proper motion RA: -11
- Secondary proper motion DEC: -3
- Durchmusterung: +52 2953
- Notes: N D
