Orbital Characteristics of Mars

Caractéristiques orbitales

Périhélie: 206,669,000 km, 1.381497 AE
Aphélie: 249,209,300 km, 1.665861 AE
Demi-grand axe: 227,939,100 km, 1.523679 AE
Excentricité: 0.093315
Période de révolution: 686.971 jours, 1.8808 jours, 668.5991 sols
Période synodique: 779.96 jours, 2.135 années
Vitesse orbitale moyenne: 24.077 km/s
Anomalie moyenne:
Inclinaison: 1.850°
Longitude du nœud ascendant: 49.562°
Argument du périhélie: 286.537°

Satellites/Lunes: 2 (Phobos, Deimos)

Physical Characteristics of Mars

Caractéristiques physiques

Rayon équatorial: 3,396.2 ± 0.1 km km (0.533 x Terre)
Aplatissement: 0.00589 ± 0.00015
Superficie: 144,798,500 km2 (0.284 x Terre)
Volume: 1.6318×1011 km3 (0.151 x Terre)
Masse: 6.4185×1023 kg (0.107 x Terre)
Masse volumique moyenne: 3.934 g/cm3
Gravité à la surface: 3.69 m/s2
Vitesse de libération: 5.027 km/s
Sidereal rotation period: 1.025957 day Earth days, 24.62296 h Earth hours
Inclinaison de l’axe: 25.19°
Albédo moyen: 0.15
Température de surface: 186/268 K, -87/-5 °C, -125/23 °F
Magnitude apparente: +1.8 to -2.91
Diamètre angulaire: 3.5—25.1"

The Atmosphere of Mars


  • 95.72% Carbon Dioxide (CO2)
  • 2.7% Nitrogen (N2)
  • 1.6% Argon
  • 0.2% Oxygen (O2)
  • 0.07% Carbon Monoxide (CO)
  • 0.03% Water vapor (H2O)
  • 0.01% Nitrogen Oxide (NO)
  • 2.5 ppm Neon
  • 300 ppb Krypton
  • 130 ppb Formaldehyde (H2CO)
  • 80 ppb Xenon
  • 30 ppb Ozone (O3)
  • 10 ppb Methane (CH4)

    Mars images:

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