21539+2821
- Unique Name: 21539+2821WSI 8
- RA: 21 53 54.79
- Dec: +28 20 32.0
- Discoverer: WSI
- Discoverer Number: 8
- Components:
- First year: 1998
- Last year: 2007
- Observations: 4
- First position angle: 157
- Last position angle: 259
- First separation: 0.3
- Last separation: 0.1
- Mag first component: 6.79
- Mag second component: 0.0
- Spectral type: A2
- Primary proper motion RA: -160
- Primary proper motion DEC: -114
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung: +27 4191
- Notes: NO
