Phobos Analysis

Read about this Tool

See orbit - Solar System Planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto (dwarf planet), Eris (dwarf planet)
Moons: The Moon, Phobos, Deimos, Io, Europa, Ganymede, Callisto, Enceladus, Miranda, Nereid
Various: Halley's Comet, Proxima Centuari d, Proxima Centuari b, Gliese 667 Cc, TRAPPIST-1d, Custom Orbit
Diagram of the orbit with the body being orbitted shown as a dot within the ellipse.

Phobos

Alternate Name: Mars I
Classification: Moon
Orbits: Mars
Xalyse.com Analysis System

Orbital Period

0.32 days, 0.001 years
 
Earth

 
Phobos


Surface Gravity (at mean Radius)

0.057 % Standard Gravity, 0.006 m/s/s
Earth / Phobos Surface Gravity Ratio:
Earth's Gravity is 1749.8 X Phobos Gravity
(using Phobos mean radius, and Earth standard gravity)

Escape Velocity (at mean Radius)

0.1 % Earth Escape Velocity, 0.011 km/s,
40.456 km/h, 25.138 mph, 11.238 m/s,
(using Phobos mean radius, and Earth escape velocity at mean radius)

Properties

0.2 % Earth (mean) Diameter
Mass: 1.785E-09 X Earth Mass
Eccentricity: 0.0151
Data input Source: Wikipedia
Xalyse Analysis System by: RL / JL
Apoapsis: 6E-05 AU, 9517.6 km
Periapsis: 6E-05 AU, 9234.4 km



DISCLAIMER: No warranty is given about the accuracy of these results, or the accuracy of the information on this page, use this information at your own risk.


Phobos Surface Conditions - Falling Time

Xalyse.com Mean Radius Gravity Analysis System

Surface Gravity (at mean radius): 0.0056 m/s/s, 0.057 % Earth Standard Gravity

Earth / Phobos Surface Gravity Ratio:
Earth's Gravity is 1749.8 X Phobos Gravity
(using Phobos mean radius, and Earth standard gravity)
Safe Fall Height: 1749.8 X Safe Earth Fall Height

Time for object to Fall 1m on Phobos (at mean radius): 18.89 seconds

Time for object to Fall 0.61 m, 2 ft on Earth: 0.35 seconds
Impact Speed of falling 0.61 m, 2 ft on Earth: 3.46 m/s, 12.45 km/h, 7.73 mph

Height on Phobos to fall same speed of falling 0.61 m, 2 ft on Earth:
1066.69 m, 3499.6 ft
Time for object to Fall 1066.69 m, 3499.6 ft (at mean radius) on Phobos:
616.98 seconds
Impact Speed of falling 1066.69 m, 3499.6 ft on Phobos: 3.46 m/s, 12.45 km/h, 7.73 mph

DISCLAIMER: No warranty is given about the accuracy of these results, or the accuracy of the information on this page, use this information at your own risk.

Additional Information

Semi-Major Axis: 9376 km, 0 AU
Semi-Minor Axis: 9374.9 km, 6E-05 AU, 100 % of Semi-Major-Axis
Eccentricity: 0.0151, Linear Eccentricity: 141.6 km, 0 AU

DISCLAIMER: No warranty is given about the accuracy of these results, or the accuracy of the information on this page, use this information at your own risk.

About

This tool allows you to see the orbit of specific planets, moons and comets.

Click a link in the "See orbit" section at the top of the page, or go to the Space Section to see other orbits.

For planets the orbit around the sun is shown.

For moons, the orbit around the planet is shown.

The following data is sourced from Wikipedia for various planets, moons and comets:

  • Semi-major axis *
  • Eccentricity
  • Orbital period
  • Host star radius
  • Host star luminosity
  • Mass
  • Mean radius
  • Equatorial radius
  • Atmosphere Composition

From this data this tool calculates things such as:

  • The orbital diagram
  • Apoapsis / aphelion
  • Periapsis / perihelion
  • Visible Diameters of host star (e.g Sun visible diameter) at different positions of orbits
  • Total solar irradiance at different positions of orbits
  • Surface gravity at mean radius or equatorial radius
  • Equivalent heights to produce the same falling speed on Earth
  • Falling time for specific heights
  • Falling speed for specific heights

* Io and Europa semi-major axis simply calculated from average of periapsis and apoapsis.

If you have any questions about this tool or find it useful we would like to hear from you.

Contact Us

Created by: RL / JL
Last Updated: 2023/06/03

DISCLAIMER: The tools on this website are designed to be highly accurate, but we cannot and will not be held responsible should any inaccuracy occur.

Use this tool, or the information on this page, or any of the information on this website at your own risk.

No warranty is given about the accuracy of the results, or the accuracy of the information on this page.