21030+2457
- Unique Name: 21030+2457BKO 482
- RA: 21 02 58.59
- Dec: +24 57 35.7
- Discoverer: BKO
- Discoverer Number: 482
- Components:
- First year: 1998
- Last year: 2008
- Observations: 3
- First position angle: 355
- Last position angle: 357
- First separation: 6.0
- Last separation: 5.7
- Mag first component: 13.0
- Mag second component: 13.5
- Spectral type:
- Primary proper motion RA: -3
- Primary proper motion DEC: -16
- Secondary proper motion RA:
- Secondary proper motion DEC:
- Durchmusterung:
- Notes: