Molniya orbit

Hello, you have come here looking for the meaning of the word Molniya orbit. In DICTIOUS you will not only get to know all the dictionary meanings for the word Molniya orbit, but we will also tell you about its etymology, its characteristics and you will know how to say Molniya orbit in singular and plural. Everything you need to know about the word Molniya orbit you have here. The definition of the word Molniya orbit will help you to be more precise and correct when speaking or writing your texts. Knowing the definition ofMolniya orbit, as well as those of other words, enriches your vocabulary and provides you with more and better linguistic resources.

English

Etymology

From Russian мо́лния (mólnija, “lightning”) +‎ orbit. The Russian word was used as the name for a series of Soviet/Russian communications satellites, and the orbits which they were placed in.

Noun

Molniya orbit (plural Molniya orbits)

  1. A highly elliptical orbit with an eccentricity of 0.74, inclination of 63.4 degrees, an argument of perigee of −90 degrees, and an orbital period of half a sidereal day, around the Earth.
  2. By analogy, the equivalent orbit for the southern hemisphere, with the argument of perigee changed to +90 degrees.
  3. (by extension) Both the northern and southern hemisphere orbits for the Earth.
  4. By analogy, equivalent orbits for other bodies, which provide low apparent motion across the dome of the sky at apoapsis, allowing long duration communications/observation with low tracking rates at polar latitudes.
  5. (by extension) The orbits around Earth and other bodies with these qualities.

Coordinate terms

  • tundra orbit: a similar orbit with the orbital period extended to one day (a type of geosynchronous orbit)

References

Wikious
Boobota
Sagapedia