21042+3530
- Unique Name: 21042+3530SEI1388
- RA: 21 04 15.39
- Dec: +35 29 50.1
- Discoverer: SEI
- Discoverer Number: 1388
- Components:
- First year: 1896
- Last year: 2002
- Observations: 7
- First position angle: 212
- Last position angle: 211
- First separation: 21.9
- Last separation: 22.3
- Mag first component: 11.24
- Mag second component: 12.55
- Spectral type:
- Primary proper motion RA: -8
- Primary proper motion DEC: -9
- Secondary proper motion RA: -9
- Secondary proper motion DEC: -11
- Durchmusterung:
- Notes: