Astronomy |
Planets -
Pluto
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Bulk Parameters | Orbital Parameters
Observational Parameters | Atmospheric Parameters
Satellites |
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| Bulk Parameters |
Black-Body Temperature |
42.7 K |
Bond Albedo |
0.145 |
Escape Velocity |
1.1 km s−1 |
GM |
0.000 83 × 106 km 3 s−2 |
Mass |
0.012 5 × 1024 kg |
Mean Density |
2 050 kg m−3 |
Solar Irradiance |
0.9 W m−2 |
Surface Gravity (At Pressure = 1 bar) |
0.66 m s−2 |
Visual Geometric Albedo |
0.3 |
Volume |
0.616 × 10 10 km3 |
Volumetric Mean Radius |
1 137 km |
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| Orbital Parameters |
Aphelion |
7 381.2 × 106 km |
Mean Orbital Velocity |
4.75 km s−1 |
Obliquity to Orbit |
122.46 ° |
Orbital Eccentricity |
0.248 8 |
Orbital Inclination |
17.14 ° |
Perihelion |
4 445.8 × 106 km |
Semimajor Axis |
5 906.4 × 106 km |
Sidereal Orbit Period |
90 465 days |
Sidereal Rotation Period |
153.292 8 hours |
Synodic Period |
366.73 days |
Tropical Orbit Period |
90 588 days |
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| Observational Parameters |
Apparent Magnitude near Opposition |
15.1 |
Maximum Apparent Diameter from Earth |
0.11 arc seconds |
Maximum Distance from Earth |
7533.3 × 106 km |
Minimum Apparent Diameter from Earth |
0.06 arc seconds |
Minimum Distance from Earth |
4293.7 × 106 km |
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| Atmospheric Parameters |
Average Temperature |
about 50 K |
Mean Molecular Weight |
16 g mol−1 to 25 g mol−1 |
Scale Height |
about 60 km |
Surface Pressure |
about 3 µbars |
| Methane CH4 |
Uncertain Amount |
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| Nitrogen N2 |
Uncertain Amount |
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