21529+3901
- Unique Name: 21529+3901SEI1542
- RA: 21 52 52.21
- Dec: +39 00 56.8
- Discoverer: SEI
- Discoverer Number: 1542
- Components:
- First year: 1895
- Last year: 2011
- Observations: 5
- First position angle: 169
- Last position angle: 172
- First separation: 28.7
- Last separation: 30.2
- Mag first component: 12.41
- Mag second component: 12.25
- Spectral type:
- Primary proper motion RA: 13
- Primary proper motion DEC: 4
- Secondary proper motion RA: -2
- Secondary proper motion DEC: -5
- Durchmusterung:
- Notes: