[WSF logo]

Planetary Factoids

Planet Gravity (Earth=1) Mean distance from Sun Diameter Mass (Compared to Earth) Satellites¹ Length of Year Rotational Period Inclination of Axis
Mercury 0.38 57,910,000 km
(35,980,000 mi)
4,878 km
(3,031 mi)
0.055 0 87.97 days 58.647 days
Venus 0.90 108,200,000 km
(67,240,000 mi)
12,104 km
(7500 mi)
0.815 0 225 days 243 days
(retrograde)
177.3°
Earth 1 149,600,000 km
(92,960,000 mi)
12,756 km
(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)
3,540 km
(2,200 mi)
0.0123 - Orbital period:
27.3 days
27.3 days 1.53°
Mars 0.38 227,900,000 km
(141,600,000 mi)
6,790 km
(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)
142,980 k
(88,700 mi)
318.0 66 11.86 years 9.92 hours 3.12°
Saturn 0.92 1,427,000,000 km
(911,400,000 mi)
120,536 km
(74,901 mi)
95.2 62 29.46 years 10.66 hours 26.73°
Uranus 0.89 2.871 billion km
(1.784 billion mi)
51,118 km
(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)
50,538 km
(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)
950 km
(590 mi)
0.028 0 4.599 years 9.07 hours
Pluto³ 0.6 5.9 billion km
(3.67 billion mi)
2,302 km
(1430.4 mi)
0.058 5 248.09 years 6.39 days (retrograde) 119.61°
Haumea 0.44 6.48 billion km
(4.03 billion mi)
1,400 km
(870 mi)
0.045 2 283.28 years 0.16 days 28.22°
Makemake 0.4 6.85 billion km
(4.26 billion mi)
1,420 km
(882 mi)
0.051 0 309.9 years 0.32 days 29°
Eris 0.68 10.2 billion km
(6.34 billion mi)
2,397 km
(1,489.4 mi)
0.082 1 557 years approximately 1 day 46.87°
 

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 Orcus, Quaoar, 2007 OR₁₀, and Sedna.

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: 15 August 2015 12:11:17.