21143+3402
- Unique Name: 21143+3402GYL 49
- RA: 21 14 16.14
- Dec: +34 01 53.1
- Discoverer: GYL
- Discoverer Number: 49
- Components:
- First year: 1893
- Last year: 2011
- Observations: 7
- First position angle: 150
- Last position angle: 148
- First separation: 16.7
- Last separation: 16.5
- Mag first component: 9.0
- Mag second component: 10.0
- Spectral type: A5
- Primary proper motion RA: 16
- Primary proper motion DEC: 12
- Secondary proper motion RA: 18
- Secondary proper motion DEC: 12
- Durchmusterung: +33 4202
- Notes: