Mercury ( Utarid )

Mercury ( Utarid )


Orbital Characteristics

Perihelion: 46,001,200 km, 0.307499 AE

Aphelion: 69,816,900 km, 0.466697 AE

Semi-major axis: 57,909,100 km, 0.387098 AE

Eccentricity: 0.205630

Orbital period: 87.9691 days, 0.240846 years

Synodic period: 115.88 days

Average orbital speed: 47.87 km/s

Mean anomaly: 174.796°

Inclination: 7.005°

Longitude of ascending node: 48.331°

Argument of perihelion: 29.124°


Satellites/moons: 0


Physical Characteristics

Equatorial radius: 2,439.7 km (0.3829 x Earth)

Flattening: < 0.0006

Surface area: 7.48×1070.108 km2 ( x Earth)

Volume: 6.083×1010 km3 (0.054 x Earth)

Mass: 3.3022×1023 kg (0.055 x Earth)

Mean density: 5.427 g/cm3

Equatorial surface gravity: 3.7 m/s2

Escape velocity: 4.25 km/s

Sidereal rotation period: 58.646 Earth days, 1407.5 Earth hours

Axial tilt : 2.11′ ± 0.1′

Albedo: 0.106

Average surface temperatures: 100/700 K, -173/427 °C, -279/801 °F

Apparent magnitude: −1.9

Angular diameter: 4.5" – 13"


The Atmosphere

Composition:

42% Oxygen (O2)

29.0% Sodium

22.0% Hydrogen (H2)

6.0% Helium

0.5% Potassium

Trace amounts of Argon, Nitrogen (N2), Carbon Dioxide (CO2), water vapor (H2O), Xenon, Krypton, Neon .
 
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