21287+4952
- Unique Name: 21287+4952STF2800
- RA: 21 28 43.09
- Dec: +49 52 06.6
- Discoverer: STF
- Discoverer Number: 2800
- Components:
- First year: 1828
- Last year: 2010
- Observations: 18
- First position angle: 261
- Last position angle: 249
- First separation: 9.0
- Last separation: 9.0
- Mag first component: 9.5
- Mag second component: 10.41
- Spectral type: A5
- Primary proper motion RA: 9
- Primary proper motion DEC: 6
- Secondary proper motion RA: 12
- Secondary proper motion DEC: 7
- Durchmusterung: +49 3533
- Notes: