Mars ( Marikh )

Mars ( Marikh)

Orbital Characteristics


Perihelion: 206,669,000 km, 1.381497 AE

Aphelion: 249,209,300 km, 1.665861 AE

Semi-major axis: 227,939,100 km, 1.523679 AE

Eccentricity: 0.093315

Orbital period: 686.971 days, 1.8808 days, 668.5991 sols

Synodic period: 779.96 days, 2.135 years

Average orbital speed: 24.077 km/s

Mean anomaly:

Inclination: 1.850°

Longitude of ascending node: 49.562°

Argument of perihelion: 286.537°



Satellites/moons: 2 (Phobos, Deimos)



Physical Characteristics

Equatorial radius: 3,396.2 ± 0.1 km km (0.533 x Earth)

Flattening: 0.00589 ± 0.00015

Surface area: 144,798,500 km2 (0.284 x Earth)

Volume: 1.6318×1011 km3 (0.151 x Earth)

Mass: 6.4185×1023 kg (0.107 x Earth)

Mean density: 3.934 g/cm3

Equatorial surface gravity: 3.69 m/s2

Escape velocity: 5.027 km/s

Sidereal rotation period: 1.025957 day Earth days, 24.62296 h Earth hours

Axial tilt : 25.19°

Albedo: 0.15

Average surface temperatures: 186/268 K, -87/-5 °C, -125/23 °F

Apparent magnitude: +1.8 to −2.91

Angular diameter: 3.5—25.1"


The Atmosphere

Composition:

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)

Source