21004+3411
- Unique Name: 21004+3411BU 1329AB,C
- RA: 21 00 26.00
- Dec: +34 10 42.4
- Discoverer: BU
- Discoverer Number: 1329
- Components: AB,C
- First year: 1902
- Last year: 2002
- Observations: 13
- First position angle: 32
- Last position angle: 30
- First separation: 6.5
- Last separation: 6.8
- Mag first component: 8.2
- Mag second component: 9.6
- Spectral type: A2
- Primary proper motion RA: -4
- Primary proper motion DEC: -10
- Secondary proper motion RA: -8
- Secondary proper motion DEC: -10
- Durchmusterung:
- Notes: