SATELLITES OF JUPITER.
| Name. | Discoverer. | Mean distance from Jupiter. Miles. | Sidereal period. d. h. m. | Diameter. Miles. | Apparent diameter of Jupiter seen from satellite. ° ″ | Apparent star magnitude. | ||
|---|---|---|---|---|---|---|---|---|
| 5. | Barnard | ....... | 0 11 49 | ? | ..... | .... | ||
| 1. IO | ............... | 267,000 | 1 18 29 | 2,390 | 19 49 | 7 | ||
| 2. EUROPA | Galileo, January 7-13, 1610. | 425,000 | 3 13 13 | 2,120 | 12 25 | 7 | ||
| 3. GANYMEDE | ............... | 678,000 | 7 4 0 | 3,980 | 7 47 | 6 | ||
| 4. CALLISTO | ............... | 1,192,000 | 16 18 5 | 2,970 | 4 25 | 7 |