21421+0104
- Unique Name: 21421+0104CHE 309
- RA: 21 42 04.51
- Dec: +01 04 37.6
- Discoverer: CHE
- Discoverer Number: 309
- Components:
- First year: 1907
- Last year: 2000
- Observations: 3
- First position angle: 347
- Last position angle: 337
- First separation: 27.5
- Last separation: 27.3
- Mag first component: 10.13
- Mag second component: 13.42
- Spectral type:
- Primary proper motion RA: 51
- Primary proper motion DEC: 15
- Secondary proper motion RA: 6
- Secondary proper motion DEC: -3
- Durchmusterung: +00 4768
- Notes: