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  2. Molniya orbit - Wikipedia

    en.wikipedia.org/wiki/Molniya_orbit

    Download as PDF; Printable version; ... is the orbital inclination, is the ... The exact height of a satellite in a Molniya orbit varies between missions, but a ...

  3. Comparison of retired orbital launch systems - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_retired...

    Download as PDF; Printable version; In other projects ... This article contains too many charts, tables, ... NPO Molniya. 58.8 m 30,000 [18] [e] Yes 1:

  4. Molniya (satellite) - Wikipedia

    en.wikipedia.org/wiki/Molniya_(satellite)

    Download as PDF; Printable version; In other projects ... (and the upgrade Molniya 1T) ... and the orbital period needed to be approximately half a sidereal day ...

  5. List of orbits - Wikipedia

    en.wikipedia.org/wiki/List_of_orbits

    Molniya orbit: A semi-synchronous variation of a Tundra orbit. For Earth this means an orbital period of just under 12 hours. Such a satellite spends most of its time over two designated areas of the planet. An inclination of 63.4° is normally used to keep the perigee shift small. [15]

  6. Highly elliptical orbit - Wikipedia

    en.wikipedia.org/wiki/Highly_elliptical_orbit

    A highly elliptical orbit (HEO) is an elliptic orbit with high eccentricity, usually referring to one around Earth.Examples of inclined HEO orbits include Molniya orbits, named after the Molniya Soviet communication satellites which used them, and Tundra orbits.

  7. Molniya-M - Wikipedia

    en.wikipedia.org/wiki/Molniya-M

    The Molniya-M (Blok-ML) was scheduled to be the last variant to fly, with two launches of Molniya spacecraft scheduled to occur in 2008; however, they were cancelled in light of the launch failure in 2005, in favour of the Meridian spacecraft.

  8. Comparison of orbital launcher families - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_orbital...

    The article is organized into two tables: the first contains a list of currently active and under-development launcher families, while the second contains a list of retired launcher families. The related article " Comparison of orbital launch systems " lists each individual launcher system within any given launcher family, categorized by its ...

  9. Medium Earth orbit - Wikipedia

    en.wikipedia.org/wiki/Medium_Earth_orbit

    Clickable image, highlighting medium altitude orbits around Earth, [a] from Low Earth to the lowest High Earth orbit (geostationary orbit and its graveyard orbit, at one ninth of the Moon's orbital distance), [b] with the Van Allen radiation belts and the Earth to scale To-scale diagram of low, medium, and high Earth orbits Space of Medium Earth orbits (MEO) as pink area, with Earth and the ...