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List of stars and star systems beginning with the letter "J".
| Star or star system | Arity | Makeup | Associated bodies | Locational references |
|---|---|---|---|---|
| J-25 | ||||
| Janus | Janus VI | |||
| Jassan | part of trinary star system | Caspan, Paegan | near Sol (within 25 light-years) | |
| Jenshahn | singular | near Sol (within 25 light-years) |