Link to the start of the homepage Link to the planet Mars Link to the satellite Deimos of the planet Mars Link to the satellite Deimos of the planet Mars Switch over to the german language Control the graphics effects Link to the imprint page Write an E-Mail to the author Minimize the title bar
sol mercury venus earth mars asteroid jupiter saturn uranus neptune pluto comet
Orbit data - Object data - Mythology - Links Go to the bottom of the page
Photo of the satellite Phobos of the planet Mars
Phobos   Mars I

Hide this area Orbit data
Mean distance from the planet Mars 9.378 km
Orbital period around the planet Mars (sideric) 7,65 h
Mean orbital velocity 2,14 km/s
Orbital inclination 1,082 °
Eccentricity of the orbit around the planet Mars 0,0151
Hide this area Object data
Discovered by Asaph Hall 1877
Mass 1,06 × 1016 kg
Equatorial radius 13,4 × 11,2 × 9,2 km
Mean density 1,9 g/cm³
Escape velocity 0,0103 km/s
Surface force of gravity 0,3 m/s²
Rotational period (synchronous) 7,65 h
Albedo 0,07
Apparent magnitude + 11,3 mvis
Hide this area Mythology

Phobos ("fright") is the greek personification of fear and terror. He is usually considered to be a son of Ares, and accompanying him in battle, instilling fear in all he saw. His brother of Deimos.

Hide this area Links
File icon NASA (Viking Orbiter) - High Resolution Mosaic of Phobos
© Calvin J. Hamilton ("Views of the Solar System")
File icon NASA (Viking Orbiter) - Stickney Crater on Phobos
Link to the page "Views of the Solar System"
File icon Welcome to the Planets
Online version of the "Planetary Data System Educational CD-ROM"
File icon A Multimedia Tour of the Solar System - The Nine Planets
© William A. Arnett
© 2022 by Bernd Onasch - Imprint Go to the top of the page