21413+3928
- Unique Name: 21413+3928BU 274
- RA: 21 41 18.85
- Dec: +39 28 26.4
- Discoverer: BU
- Discoverer Number: 274
- Components:
- First year: 1875
- Last year: 2002
- Observations: 22
- First position angle: 181
- Last position angle: 181
- First separation: 3.5
- Last separation: 3.4
- Mag first component: 8.24
- Mag second component: 9.94
- Spectral type: K0
- Primary proper motion RA: 2
- Primary proper motion DEC: 3
- Secondary proper motion RA: 2
- Secondary proper motion DEC: -7
- Durchmusterung: +38 4576
- Notes: