THE SATELLITES OF MARS.

Name.Mean Distance from
Centre of Mars.
Periodic Time.
Hrs.Mins.Secs.
Phobos 5,800 miles. 73914
Deimos14,500 ” 301754

THE SATELLITES OF JUPITER.

Name.Mean Distance from
Centre of Jupiter.
Periodic Time.
DaysHrs.Mins.Secs.
I 262,000 miles. 1182734
II 417,000 ” 3131342
III 664,000 ” 7 34233
IV1,170,000 ” 16163211
V 112,400 ” 1157(?)

THE SATELLITES OF SATURN.

Name.Mean Distance from
Centre of Saturn.
Periodic Time.
DaysHrs.Mins.Secs.
Mimas 118,000 miles. 0223727.9
Enceladus 152,000 ” 1 853 6.7
Tethys 188,000 ” 1211825.7
Dione 241,000 ” 21741 8.9
Rhea 337,000 ” 4122510.8
Titan 781,000 ” 15224125.2
Hyperion 946,000 ” 21 7 740.8
Iapetus2,280,000 ” 79 75440.4

A ninth satellite was discovered in August, 1898, by Prof. W. H. Pickering, but its mean distance and periodic time have not yet been determined with precision.

THE SATELLITES OF URANUS.

Name.Mean Distance from
Centre of Uranus.
Periodic Time.
Days.
Ariel119,000 miles. 2.520383
Umbriel166,000 ” 4.144121
Titania272,000 ” 8.705897
Oberon363,000 ” 13.463269

THE SATELLITE OF NEPTUNE.