21042-5520
- Unique Name: 21042-5520HJ 5239AB,C
- RA: 21 04 13.40
- Dec: -55 19 58.8
- Discoverer: HJ
- Discoverer Number: 5239
- Components: AB,C
- First year: 1835
- Last year: 2001
- Observations: 14
- First position angle: 212
- Last position angle: 211
- First separation: 15.0
- Last separation: 12.8
- Mag first component: 9.18
- Mag second component: 9.94
- Spectral type: G5III
- Primary proper motion RA: 104
- Primary proper motion DEC: -109
- Secondary proper motion RA: 104
- Secondary proper motion DEC: -115
- Durchmusterung: -55 9505
- Notes: