21072+3657
- Unique Name: 21072+3657SEI1407AB
- RA: 21 07 12.26
- Dec: +36 57 00.6
- Discoverer: SEI
- Discoverer Number: 1407
- Components: AB
- First year: 1895
- Last year: 2012
- Observations: 11
- First position angle: 287
- Last position angle: 274
- First separation: 10.5
- Last separation: 13.3
- Mag first component: 8.18
- Mag second component: 10.75
- Spectral type: A0
- Primary proper motion RA: 1
- Primary proper motion DEC: 0
- Secondary proper motion RA: -29
- Secondary proper motion DEC: -16
- Durchmusterung: +36 4416
- Notes: NL
