21008+4635
- Unique Name: 21008+4635BU 156
- RA: 21 00 49.84
- Dec: +46 34 42.8
- Discoverer: BU
- Discoverer Number: 156
- Components:
- First year: 1873
- Last year: 2011
- Observations: 36
- First position angle: 260
- Last position angle: 236
- First separation: 1.2
- Last separation: 1.1
- Mag first component: 7.37
- Mag second component: 9.24
- Spectral type: B5V
- Primary proper motion RA: -4
- Primary proper motion DEC: -7
- Secondary proper motion RA: -4
- Secondary proper motion DEC: -7
- Durchmusterung: +46 3141
- Notes: N
