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Planetary Factoids
Planet
Gravity (Earth=1)
Mean distance from Sun
Diameter
Mass (Compared to Earth)
Satellites¹
Length of Year
Rotational Period
Tilt of Axis
Mercury
0.38
57,910,000 km
(35,980,000 mi)
(35,980,000 mi)
4,878 km
(3,031 mi)
(3,031 mi)
0.055
0
87.97 days
58.647 days
2°
Venus
0.90
108,200,000 km
(67,240,000 mi)
(67,240,000 mi)
12,104 km
(7500 mi)
(7500 mi)
0.815
0
225 days
243 days
(retrograde)
(retrograde)
177.3°
Earth
1
149,600,000 km
(92,960,000 mi)
(92,960,000 mi)
12,756 km
(7,926 mi)
(7,926 mi)
1.0
1
365.26 days
23.93 hours
23.45°
Moon
0.17
From Earth:
38,625 km
(240,000 mi)
38,625 km
(240,000 mi)
3,540 km
(2,200 mi)
(2,200 mi)
0.0123
-
Orbital period:
27.3 days
27.3 days
27.3 days
1.53°
Mars
0.38
227,900,000 km
(141,600,000 mi)
(141,600,000 mi)
6,790 km
(4,219 mi)
(4,219 mi)
0.107
2
687 days
24 hr 37 min
25.2°
Jupiter
2.36
778,400,000 km
(483,700,000 mi)
(483,700,000 mi)
142,980 k
(88,700 mi)
(88,700 mi)
318.0
79
11.86 years
9.92 hours
3.12°
Saturn
0.92
1,427,000,000 km
(911,400,000 mi)
(911,400,000 mi)
120,536 km
(74,901 mi)
(74,901 mi)
95.2
82
29.46 years
10.66 hours
26.73°
Uranus
0.89
2.871 billion km
(1.784 billion mi)
(1.784 billion mi)
51,118 km
(31,765 mi)
(31,765 mi)
14.6
27
84.01 years
17.24 hours
97.92°
Neptune
1.13
4.5 billion km
(2.8 billion mi)
(2.8 billion mi)
50,538 km
(31,405 mi)
(31,405 mi)
17.2
14
165 years
16.11 hours
29.6°
Dwarf Planets²
Ceres
0.27
413,715,000 km
(275,070,000 mi)
(275,070,000 mi)
950 km
(590 mi)
(590 mi)
0.028
0
4.599 years
9.07 hours
4°
Orcus
0.02
5.89 billion km
(3,66 billion mi)
(3,66 billion mi)
910 km
(565.4 mi)
(565.4 mi)
0.001
1
247.3 years
10±4 hours
? °
Pluto³
0.6
5.9 billion km
(3.67 billion mi)
(3.67 billion mi)
2,302 km
(1430.4 mi)
(1430.4 mi)
-
5
248.09 years
6.39 days (retrograde)
119.61°
Salacia
?
6.3 billion km
(3.9 mi)
(3.9 mi)
846±21 km
(536.7±13 mi)
(536.7±13 mi)
0.058
1
273.98 years
6.1 days
23.921°
Haumea
0.44
6.48 billion km
(4.03 billion mi)
(4.03 billion mi)
1,400 km
(870 mi)
(870 mi)
0.045
2
283.28 years
0.16 days
28.22°
Quaoar
0.03
166 billion km
(103 billion mi)
(103 billion mi)
1,110 km
(689.7 mi)
(689.7 mi)
0.002
1
288.8 years
8.8 hours
? °
Makemake
0.4
6.85 billion km
(4.26 billion mi)
(4.26 billion mi)
1,420 km
(882 mi)
(882 mi)
0.051
1
309.9 years
0.32 days
29°
Gonggong
0.03
10.04 billion km
(6.24 billion mi)
(6.24 billion mi)
3,057.75 km
(1900 mi)
(1900 mi)
0.0006
1
550.19 years
22 hour or 44 hours ??
50.5°
Eris
0.68
10.2 billion km
(6.34 billion mi)
(6.34 billion mi)
2,397 km
(1,489.4 mi)
(1,489.4 mi)
0.082
1
557 years
approximately 1 day
46.87°
Sedna
?
148.85 billion km
(92.5 billion mi)
(92.5 billion mi)
995 km
(618 mi)
(618 mi)
?
0
~11,400 years
10±3 hours
? °
1.) The number of satellites for each of the outer planets does keep increasing. As observation improves, new moons are always being found.
2.) Dwarf planets are a category unto themselves. They are not a subset of the planet category. There are more objects in the solar system suspected of being dwarf planets. In fact, there may be as many as 200. Likely candidates at this time are 2007 OR₁₀, Salacia, and 2002 MS₄.
3.) Pluto has 5 moons, Charon, Nix, Styx, Kerberos and Hydra. Debate continues as to whether or not Charon is a moon of Pluto, or whether Pluto and Charon compose a binary system of a dwarf double planet.
Page last modified: 04 November 2023 15:05:29.
