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Dwarf Planet Trivia
Here are planets and Moons bigger than a dwarf planet.
I will share this in case someone else has an interest in this trivia. For most people this information is useless.
I was surprised to discover Ceres, considered a dwarf planet, is ranked #32 among objects in our solar system. Our Moon is ranked #13. Two moons are bigger than Mercury. I knew some moons were big but I suppose I never appreciated how big is the stuff in general, including the TNO.
At the end of this post is the top 50 objects.
This is an analysis of the planets and their moons that are dwarf planet sized, or larger. The criteria is radius = or > that of Ceres, which is considered a dwarf planet though its diameter is roughly only 7% of Earth.
With this planet / moons outline this is somewhat their order from the sun.
Hopefully I made no major typing mistakes when compiling this data.
I compiled this list because some day I want to learn how the nebular hypothesis explains this distribution, so first I needed to see it.
Planet details
size of planet by earth radius, by earth mass (if available)
r0.10e is 10% earth radius; m0.10e is 10% earth mass.
moons = quantity of moons at the planet
Moon details
first column is its number for the planet, with 01 = closest to planet, usually; some moons were both numbered and named before more moons were found later
size details are relative to Earth, if available
Planets, followed by any big moons
Mercury
sizer0.38em0.38e R8 by diameter
moons=0
Venus
sizer0.95em0.91eR6 by diameter
moons=0
Earth
sizer1.0em1.0eR5 by diameter
moons = 1
01Moon
sizer0.27em0.17e R5 among moons
Mars
sizer0.53e m0.38eR7 by diameter
moons = 2
Ceres - dwarf planet
sizer0.07em0.03e R1 in size and mass in belt
moons=0
Jupiter
sizer11.0em318eR1
moons=79
01 Io r0.29e m0.18e R4 among moons
02 Europar0.25em0.13e R6 among moons
03 Ganymeder0.41eR1 among moons
would be R8 among planets
04 Callistor0.38em0.02e R3 among moons
Saturn
sizer9.1em95eR3 by mass, R2 by diameter
moons= 62
05 Rhear0.12esize R9 among moons
06 Titanr0.41em0.022e R2 among moons
would be R9 among planets; Ganymede is R8
08 Iapetusr0.12e m0.022e
Uranus
sizer4.0eR4 by mass, R3 by diameter
moons = 27
03 Titania size r0.12e m0.04e R8 among moons
04 Oberon size r0.12e m0.04e R10 among moons
Neptune
sizer3.9eR3 by mass, R4 by diameter
moons = 14
01 Triton sizer0.21em0.08e R7 among moons
Pluto
sizer0.19em0.06eR=9 among planets
moons = 5
01 Charon size r0.10em0.03e
Trans Neptunian Objects
Sedna- detached object
r0.08e
Erisdwarf planet, SDO
sizer0.18em0.07e
MakeMakedwarf planet, cubewano
sizer0.11e
Haumeadwarf planet - elliptical
sizer0.11em0.00e
2007 OR10resonant KBO (3:10)
size r0.01e
Quoarcubewano
size r0.09e m0.03e1110km
2002 MS4cubewano
sizer0.07e
Orcusplutino
size0.07e
Salaciacubewano
sizer0.07e
Size rank in solar system
01 Jupiter
02 Saturn
03 Uranus
04 Neptune
05 Earth
06 Venus
07 Mars
08 Ganymede
09 Titan
10 Mercury
11 Callisto
12 Io
13 Moon
14 Europa
15 Triton
16 Pluto
17 Eris
18 Haumea
19 Titania
20 Rhea
21 Oberon
22 Iapetus
23 Makemake
24 2007 OR10
25 Charon
26 Umbriel
27 Ariel
28 Dione
29 Quoar
30 Tethys
31 Sedna
32 Ceres
33 2002 MS4
34 Orcus
35 Salacia
36 2013 FY27
37 2003 AZ84
38 2002 AW197
39 Varda
40 2015 RR245
41 Dysnomia
42 2004 GV9
43 2005 RN43
44 2002 UX25
45 2007 JJ43
46 Varuna
47 Ixion
48 2007 UK126
49 Chaos
--- sun was first of the top 50 by size
Date updated 03/27/2019
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