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Substituting the mass of Mars for M and the Martian sidereal day for T and solving for the semimajor axis yields a synchronous orbit radius of 20,428 km (12,693 mi) above the surface of the Mars equator. [3] [4] [5] Subtracting Mars's radius gives an orbital altitude of 17,032 km (10,583 mi). Two stable longitudes exist - 17.92°W and 167.83°E.
For planet Earth, which can be approximated as an oblate spheroid with radii 6 378.1 km and 6 356.8 km, the mean radius is = (( ) ) / = . The equatorial and polar radii of a planet are often denoted r e {\displaystyle r_{e}} and r p {\displaystyle r_{p}} , respectively.
Extra-close oppositions of Mars happen every 15 to 17 years, when we pass between Mars and the Sun around the time of its perihelion (closest point to the Sun in orbit). The minimum distance between Earth and Mars has been declining over the years, and in 2003 the minimum distance was 55.76 million km, nearer than any such encounter in almost ...
At the bottom of the mantle lies a basal liquid silicate layer approximately 150–180 km thick. [44] [54] Mars's iron and nickel core is completely molten, with no solid inner core. [55] [56] It is around half of Mars's radius, approximately 1650–1675 km, and is enriched in light elements such as sulfur, oxygen, carbon, and hydrogen. [57] [58]
The discovery refers to a large-scale (>2000 km in length and >150 km in slip) and quite narrow (<50 km wide) strike-slip fault zone in the Valles Marineris trough system, referred to as the Ius-Melas-Coprates fault zone (Fig. 7). The Valles Marineris trough system, which is over 4000 km long, 600 km wide, and up to 7 km deep, would, if located ...
and are the masses of objects 1 and 2, and is the specific angular momentum of object 2 with respect to object 1. The parameter θ {\displaystyle \theta } is known as the true anomaly , p {\displaystyle p} is the semi-latus rectum , while e {\displaystyle e} is the orbital eccentricity , all obtainable from the various forms of the six ...
Mars may be around 140 million miles away from Earth, but the red planet is influencing our oceans, according to new research. Mars could be driving ‘giant whirlpools’ in the Earth’s deep ...
Finding k 2 is helpful in understanding the interior structure on Mars. [13] The most updated k 2 obtained by Genova's team is 0.1697 ± 0.0009. [13] As if k 2 is smaller than 0.10 a solid core would be indicated, this tells that at least the outer core is liquid on Mars, [31] and the predicted core radius is 1520–1840 km. [31]