21510+2911
- Unique Name: 21510+2911A 889
- RA: 21 51 01.97
- Dec: +29 10 31.4
- Discoverer: A
- Discoverer Number: 889
- Components:
- First year: 1904
- Last year: 2007
- Observations: 22
- First position angle: 58
- Last position angle: 58
- First separation: 0.2
- Last separation: 0.2
- Mag first component: 9.23
- Mag second component: 10.48
- Spectral type: K0
- Primary proper motion RA: 219
- Primary proper motion DEC: 183
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +28 4210
- Notes: NO
