21240+2416
- Unique Name: 21240+2416HJ 1641
- RA: 21 23 58.74
- Dec: +24 16 26.7
- Discoverer: HJ
- Discoverer Number: 1641
- Components:
- First year: 1828
- Last year: 2013
- Observations: 10
- First position angle: 328
- Last position angle: 298
- First separation: 30.0
- Last separation: 62.6
- Mag first component: 5.71
- Mag second component: 10.5
- Spectral type: F1IV
- Primary proper motion RA: 136
- Primary proper motion DEC: 18
- Secondary proper motion RA: -12
- Secondary proper motion DEC: -3
- Durchmusterung: +23 4300
- Notes:
