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Pluto

It's not classified as a planet, but as a "Pluton".

 

Pluto

Computer-generated map of Pluto from Hubble images, synthesised true color and among the highest resolutions possible with current technology (2011)

Pluto and its moons, Charon, Nix, Hydra, and P4

(Hubble Space Telescope, 2006)

 

Table credit: Wikiedia (http://en.wikipedia.org/wiki/Pluto)

Pluton Profile ( circa 2011)

Discovered by Clyde W. Tombaugh
Discovery date February 18, 1930
Designations
MPC designation 134340 Pluto
Pronunciation /ˈplt/,
Named after Pluto
Minor planet
category
dwarf planet,
TNO,
plutoid,
KBO,
plutino
Adjective Plutonian
Epoch J2000
Aphelion 7,311,000,000 km
48.871 AU
Perihelion 4,437,000,000 km
29.657 AU
(1989 Sep 05)
Semi-major axis 5,874,000,000 km
39.264 AU
Eccentricity 0.248 807 66
Orbital period 90,613.305 days
248.09 years
14,164.4 Pluto solar days
Synodic period 366.73 days
Average orbital speed 4.666 km/s
Mean anomaly 14.86012204
Inclination 17.141 75
11.88 to Sun's equator
Longitude of ascending node 110.303 47
Argument of perihelion 113.763 29
Satellites 4
Physical characteristics
Mean radius 1,153 10 km
(0.18 Earths)
1161 km (solid)
Surface area 1.665107 km2
0.033 Earths
Volume 6.39109 km3
0.0059 Earths
Mass (1.305 0.007)1022 kg
0.00218 Earths
0.178 Moons
Mean density 2.03 0.06 g/cm3
Equatorial surface gravity 0.658 m/s2
0.067 g
Escape velocity 1.229 km/s
Sidereal rotation
period
−6.387 230 day
6 d 9 h 17 m 36 s
Equatorial rotation velocity 47.18 km/h
Axial tilt 119.591 0.014 (to orbit)
North pole right ascension 312.993
North pole declination 6.163
Albedo 0.490.66 (geometric, varies by 35%)
Surface temp.
Kelvin
min mean max
33 K 44 K 55 K
Apparent magnitude 13.65 to 16.3
(mean is 15.1)
Absolute magnitude (H) −0.7
Angular diameter 0.065" to 0.115"
Atmosphere
Surface pressure 0.30 Pa (summer maximum)
Composition nitrogen, methane, carbon monoxide

 

 

More information about Pluto and other "Dwarf Planets" can be found by clicking here.

 

11/2011