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where is the orbital inclination, is the eccentricity, is mean motion in degrees per day, is the perturbing factor, is the radius of the earth, is the semimajor axis, and ˙ is in degrees per day. To avoid this expenditure of fuel, the Molniya orbit uses an inclination of 63.4°, for which the factor 4 − 5 sin 2 i {\displaystyle 4-5\sin ...
The system was operational by 1967, with the construction of the Orbita groundstations. [11] They had a lifespan of approximately 1.5 years, as their orbits were disrupted by perturbations, as well as deteriorating solar arrays and they had to be constantly replaced. [15] [11] [16]
3753 Cruithne is a Q-type, Aten asteroid in orbit around the Sun in 1:1 orbital resonance with Earth, making it a co-orbital object.It is an asteroid that, relative to Earth, orbits the Sun in a bean-shaped orbit that effectively describes a horseshoe, and that can change into a quasi-satellite orbit. [3]
About 7,780 Vornado VH2 Whole Room Heaters were recalled on Jan. 16 due to risk of electric shock and fire.
Audrey Hepburn’s son shared his reaction to Ivanka Trump’s recent tribute to the timeless actress. During the president’s inaugural Liberty Ball in Washington on Monday night, Ivanka wore a ...
Two medium Earth orbits are particularly significant. A satellite in the semi-synchronous orbit at an altitude of approximately 20,200 kilometres (12,600 mi) has an orbital period of 12 hours and passes over the same two spots on the equator every day. [1] This reliably predictable orbit is used by the Global Positioning System (GPS ...
The Trump administration launched an immigration enforcement blitz nationwide Sunday that included multiple federal agencies and resulted in the arrest of nearly 1,000 people, according to ...
The Trump administration has moved with lightning speed to roll out the president’s immigration agenda, effectively closing off the US southern border to asylum seekers, severely limiting who ...