21258+3329
- Unique Name: 21258+3329GYL 56
- RA: 21 25 47.80
- Dec: +33 28 55.9
- Discoverer: GYL
- Discoverer Number: 56
- Components:
- First year: 1934
- Last year: 2002
- Observations: 5
- First position angle: 4
- Last position angle: 3
- First separation: 13.1
- Last separation: 16.3
- Mag first component: 8.0
- Mag second component: 10.5
- Spectral type: B9
- Primary proper motion RA: -13
- Primary proper motion DEC: -11
- Secondary proper motion RA: -12
- Secondary proper motion DEC: -8
- Durchmusterung: +32 4156
- Notes: N
