21299+3928
- Unique Name: 21299+3928MLB 987
- RA: 21 29 53.04
- Dec: +39 29 12.7
- Discoverer: MLB
- Discoverer Number: 987
- Components:
- First year: 1935
- Last year: 2002
- Observations: 3
- First position angle: 259
- Last position angle: 262
- First separation: 7.2
- Last separation: 7.1
- Mag first component: 10.0
- Mag second component: 10.2
- Spectral type:
- Primary proper motion RA: 5
- Primary proper motion DEC: -6
- Secondary proper motion RA: -14
- Secondary proper motion DEC: 4
- Durchmusterung:
- Notes: