List of Gravitationally Rounded Objects of The Solar System - Satellite Planemos

Satellite Planemos

Key
€
Satellite of Earth		 ₤
Satellite of Jupiter		 $
Satellite of Saturn		 ₩
Satellite of Uranus		 ₦
Satellite of Neptune
Satellite of Pluto
See also: List of moons

There are 19 natural satellites in the Solar System that are known to be massive enough to have achieved hydrostatic equilibrium, what Alan Stern calls satellite planets. Another satellite, the Neptunian moon Proteus, is not in hydrostatic equilibrium, but is slightly larger than Mimas, the smallest of the 19 satellite planemos. Satellites are listed first in order from the Sun, and second in order from their parent body.

€Moon ₤Io ₤Europa ₤Ganymede ₤Callisto $Mimas $Enceladus $Tethys $Dione $Rhea
Astronomical symbol
Mean distance
from primary:		 km 384,399 421,600 670,900 1,070,400 1,882,700 185,520 237,948 294,619 377,396 527,108
Mean radius km
:E		 1,737.1
0.273		 1,815
0.286		 1,569
0.245		 2,634.1
0.413		 2,410.3
0.378		 198.30
0.031		 252.1
0.04		 533
0.083		 561.7
0.088		 764.3
0.12
Surface area km²
:E		 37,930,000
0.074		 41,910,000
0.082		 30,900,000
0.061		 87,000,000
0.143		 73,000,000
0.143		 490,000
0.001		 799,000
0.0016		 4,940,000
0.01		 3,965,000
0.0078		 7,337,000
0.0144
Volume km3
:E		 2.2×1010
0.02		 2.53×1010
0.02		 1.59×1010
0.07		 7.6×1010
0.15		 5.9×1010
0.05		 3.3×107
0.00003		 6.7×107
0.00006		 6.3×108
0.0006		 7.4×108
0.0007		 1.9 ×109
0.0017
Mass kg
:E		 7.3477×1022
0.0123		 8.94×1022
0.015		 4.80×1022
0.008		 1.4819×1023
0.025		 1.0758×1023
0.018		 3.75×1019
0.000006		 1.08×1020
0.000018		 6.174×1020
0.00132		 1.095×1021
0.0003		 2.306×1021
0.0004
Density g/cm3 3.3464 3.528 3.01 1.936 1.83 1.15 1.61 0.98 1.48 1.23
Equatorial gravity m/s2 1.622 1.796 1.314 1.428 1.235 0.0636 0.111 0.145 0.231 0.264
Escape velocity km/s 2.38 2.56 2.025 2.741 2.440 0.159 0.239 0.393 0.510 0.635
Rotation period days 27.321582
(sync)		 1.7691378
(sync)		 3.551181
(sync)		 7.154553
(sync)		 16.68902
(sync)		 0.942422
(sync)		 1.370218
(sync)		 1.887802
(sync)		 2.736915
(sync)		 4.518212
(sync)
Orbital period about primary days 27.32158 1.769138 3.551181 7.154553 16.68902 0.942422 1.370218 1.887802 2.736915 4.518212
Mean orbital speed km/s 1.022 17.34 13.740 10.880 8.204 14.32 12.63 11.35 10.03 8.48
Eccentricity 0.0549 0.0041 0.009 0.0013 0.0074 0.0202 0.0047 0.02 0.002 0.001
Inclination to primary's equator deg. 18.29–28.58 0.04 0.47 1.85 0.2 1.51 0.02 1.51 0.019 0.345
Axial tilt deg. 6.68 0 0 0–0.33 0 0 0 0 0 0
Mean surface temperature K 220 130 102 110 134 64 75 64 87 76
Atmospheric composition H He Na+ K+ Ar SO2 O2 O2 O2 CO2 H2O, N2, CO2, CH4
Rings? No No No No No No No No No Yes?
$Titan $Iapetus ₩Miranda ₩Ariel ₩Umbriel ₩Titania ₩Oberon ₦Triton ¶Charon
Mean distance
from primary:		 km 1,221,870 3,560,820 129,390 190,900 266,000 436,300 583,519 354,759 17,536
Mean radius km
:E		 2,576
0.404		 735.60
0.115		 235.8
0.037		 578.9
0.091		 584.7
0.092		 788.9
0.124		 761.4
0.119		 1353.4
0.212		 603.5
0.095
Surface area km²
:E		 83,000,000
0.163		 6,700,000
0.013		 700,000
0.0014		 4,211,300
0.008		 4,296,000
0.008		 7,820,000
0.015		 7,285,000
0.014		 23,018,000
0.045		 4,580,000
0.009
Volume km3
:E		 7.16×1010
0.066		 1.67×109
0.0015		 5.5×107
0.00005		 8.1×108
0.0008		 8.4×108
0.0008		 2.06×109
0.0019		 1.85×109
0.0017		 1×1010
0.00958		 9.2×108
0.00085
Mass kg
:E		 1.3452×1023
0.023		 1.8053×1021
0.0003		 6.59×1019
0.00001		 1.35×1021
0.00022		 1.2×1021
0.0002		 3.5×1021
0.0006		 3.014×1021
0.00046		 2.14×1022
0.00358		 1.52×1021
0.00025
Density g/cm3 1.88 1.08 1.20 1.67 1.40 1.72 1.63 2.061 1.65
Equatorial gravity m/s2 1.35 0.22 0.08 0.27 0.23 0.39 0.35 0.78 0.28
Escape velocity km/s 2.64 0.57 0.19 0.56 0.52 0.77 0.73 1.46 0.58
Rotation period days 15.945
(sync)		 79.322
(sync)		 1.414
(sync)		 2.52
(sync)		 4.144
(sync)		 8.706
(sync)		 13.46
(sync)		 5.877
(sync)		 6.387
(sync)
Orbital period about primary days 15.945 79.322 1.4135 2.520 4.144 8.706 13.46 −5.877 6.387
Mean orbital speed km/s 5.57 3.265 6.657 5.50898 4.66797 3.644 3.152 4.39 0.2
Eccentricity 0.0288 0.0286 0.0013 0.0012 0.005 0.0011 0.0014 0.00002 0.0022
Inclination to primary's equator deg. 0.33 14.72 4.22 0.31 0.36 0.14 0.10 157 ?
Axial tilt deg. 0 0 0 0 0 0 0 0 ?
Mean surface temperature K 93.7 130 59 58 61 60 61 38 53
Atmospheric composition N2, CH4 N2, CH4

Read more about this topic:  List Of Gravitationally Rounded Objects Of The Solar System

Famous quotes containing the word satellite:

    “Books are the best things, well used; abused, among the worst. What is the right use? What is the one end, which all means go to effect? They are for nothing but to inspire. I had better never see a book, than to be warped by its attraction clean out of my own orbit, and made a satellite instead of a system.”
    —Ralph Waldo Emerson (1803–1882)