The Solar System

APPENDIX A 609

■ Table A-11 ❙ Principal Satellites of the Solar System

Planet Satellite

Radius

(km)

Distance

from Planet

(10^3 km)

Orbital

Period

(days)

Orbital

Eccentricity

Orbital

Inclination

Earth Moon 1738 384.4 27.32 0.055 5°.1

Mars Phobos 14  12  10 9.4 0.32 0.018 1°.0

Deimos 8  6  5 23.5 1.26 0.002 2°.8

Jupiter Amalthea 135  100  78 182 0.50 0.003 0°.4

Io 1820 422 1.77 0.000 0°.3

Europa 1565 671 3.55 0.000 0°.5

Ganymede 2640 1071 7.16 0.002 0°.2

Callisto 2420 1884 16.69 0.008 0°.2

Himalia  85 11,470 250.6 0.158 27°.6

Saturn Janus 110  80  100 151.5 0.70 0.007 0°.1

Mimas 196 185.5 0.94 0.020 1°.5

Enceladus 250 238.0 1.37 0.004 0°.0

Tethys 530 294.7 1.89 0.000 1°.1

Dione 560 377 2.74 0.002 0°.0

Rhea 765 527 4.52 0.001 0°.4

Titan 2575 1222 15.94 0.029 0°.3

Hyperion 205  130  110 1484 21.28 0.104 0°.5

Iapetus 720 3562 79.33 0.028 14°.7

Phoebe 110 12,930 550.4 0.163 150°

Uranus Miranda 242 129.9 1.41 0.017 3°.4

Ariel 580 190.9 2.52 0.003 0°

Umbriel 595 266.0 4.14 0.003 0°

Titania 805 436.3 8.71 0.002 0°

Oberon 775 583.4 13.46 0.001 0°

Neptune Proteus 205 117.6 1.12  0 0°

Triton 1352 354.59 5.88 0.00 160°

Nereid 170 5588.6 360.12 0.76 27.7°

APPENDIX A 609

■ Table A-12 ❙ Meteor Showers

Shower Dates

Hourly

Rate

Radiant of shower Associated

R.A. Dec. Comet

Quadrantids
Lyrids
 Aquarids
 Aquarids
Perseids
Orionids
Taurids
Leonids
Geminids

Jan. 2–4

April 20–22

May 2–7

July 26–31

Aug. 10–14

Oct. 18–23

Nov. 1–7

Nov. 14–19

Dec. 10–13

30

8

10

15

40

15

8

6

50

15 h 24 m

18 h 4 m

22 h 24 m

22 h 36 m

3 h 4 m

6 h 20 m

3 h 40 m

10 h 12 m

7 h 28 m

50°

33°

0°

10°

58°

15°

17°

22°

32°

1861 I

Halley?

Swift-Tuttle

Halley?

Encke

1866 I Temp