Mars  

Mars

Mars
Orbital Characteristics of Mars

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 of Mars

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 of Mars

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)


    Mars images:


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  • NASA Breaking News


    NASA Invites Media to View Launch of InSight Mars Lander from West Coast
    Media accreditation is open for the launch of NASA's next mission to Mars - the Interior Exploration using Seismic Investigations, Geodesy and Heat Transport spacecraft (InSight) from Vandenberg Air Force Base in California.
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    NASA Invites Media to Discuss First Mission to Study Mars Interior, First Interplanetary Launch from West Coast
    NASA's next mission to the Red Planet will be the topic of a media briefing at 5 p.m. EDT (2 p.m. PDT) Thursday, March 29, at NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California. The briefing will air live on NASA Television and the agency's website.
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    Two NASA Astronauts Among Crew Heading to International Space Station
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    Media Invited to View NASA Spacecraft That Will Touch the Sun
    Media are invited to view NASA’s Parker Solar Probe spacecraft at 9:30 a.m. EDT on Wednesday, March 28, at the agency’s Goddard Space Flight Center in Greenbelt, Maryland. The spacecraft will embark this summer on a daring trek, traveling closer to the Sun than any spacecraft in history.
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    Media Preview of Final Voyage of NASA's Around-the-World Atmospheric Mission
    Media are invited to preview the final deployment of one of NASA's most ambitious airborne studies of Earth's atmosphere on Friday, April 13, at Building 703 of NASA's Armstrong Flight Research Center, located in Palmdale, California.
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    NASA to Launch Parachute Test off Virginia Coast March 27
    NASA will test a parachute for possible future missions to Mars from NASA’s Wallops Flight Facility in Virginia on Tuesday, March 27. Live coverage of the test is scheduled to begin at 6:15 a.m. EDT on the Wallops Ustream site.
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    NASA to Preview Upcoming US Spacewalk, Provide Live Coverage
    Two American astronauts will venture outside the International Space Station on Thursday, March 29, for a planned 6.5-hour spacewalk. Experts from NASA will preview this work in a briefing at 2 p.m. EDT Tuesday, March 27, at NASA’s Johnson Space Center in Houston.
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    Media Invited to View NASA's Mission to Study Mars Interior
    Media are invited to view NASA's Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) lander Friday, April 6, at Vandenberg Air Force Base in California, where it's currently undergoing final tests for its May launch.
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    NASA to Discuss Upcoming Launch of Next Planet Hunter
    Join NASA at 1 p.m. EDT Wednesday, March 28, as astrophysics experts discuss the upcoming launch of NASA's next planet hunter, the Transiting Exoplanet Survey Satellite (TESS).
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