21099+4651
- Unique Name: 21099+4651SMA 129
- RA: 21 10 01.25
- Dec: +46 52 01.6
- Discoverer: SMA
- Discoverer Number: 129
- Components:
- First year: 1899
- Last year: 2003
- Observations: 4
- First position angle: 273
- Last position angle: 265
- First separation: 11.5
- Last separation: 13.8
- Mag first component: 10.43
- Mag second component: 12.61
- Spectral type:
- Primary proper motion RA: 24
- Primary proper motion DEC: 15
- Secondary proper motion RA: 1
- Secondary proper motion DEC: -3
- Durchmusterung: +46 3207
- Notes: