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  2. Sun-synchronous orbit - Wikipedia

    en.wikipedia.org/wiki/Sun-synchronous_orbit

    i is the inclination of the orbit to the equator. An orbit will be Sun-synchronous when the precession rate ρ = ⁠ d Ω d t⁠ equals the mean motion of the Earth about the Sun nE, which is 360° per sidereal year (1.990 968 71 × 10−7 rad /s), so we must set nE = ⁠ Δ ΩE TE⁠ = ρ = ⁠ Δ Ω T⁠ , where TE is the earth orbital period ...

  3. Delta-v budget - Wikipedia

    en.wikipedia.org/wiki/Delta-v_budget

    Delta- v in feet per second, and fuel requirements for a typical Apollo Lunar Landing mission. In astrodynamics and aerospace, a delta-v budget is an estimate of the total change in velocity (delta- v) required for a space mission. It is calculated as the sum of the delta-v required to perform each propulsive maneuver needed during the mission.

  4. Comparison of orbital launch systems - Wikipedia

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

    This comparison of orbital launch systems lists the attributes of all current and future individual rocket configurations designed to reach orbit. A first list contains rockets that are operational or have attempted an orbital flight attempt as of 2024; a second list includes all upcoming rockets. For the simple list of all conventional ...

  5. Orbital inclination change - Wikipedia

    en.wikipedia.org/wiki/Orbital_inclination_change

    Orbital inclination change is an orbital maneuver aimed at changing the inclination of an orbiting body's orbit. This maneuver is also known as an orbital plane change as the plane of the orbit is tipped. This maneuver requires a change in the orbital velocity vector (delta-v) at the orbital nodes (i.e. the point where the initial and desired ...

  6. Delta IV - Wikipedia

    en.wikipedia.org/wiki/Delta_IV

    Delta IV was a group of five expendable launch systems in the Delta rocket family. It flew 45 missions from 2002 to 2024. Originally designed by Boeing 's Defense, Space and Security division for the Evolved Expendable Launch Vehicle (EELV) program, the Delta IV became a United Launch Alliance (ULA) product in 2006.

  7. Delta (rocket family) - Wikipedia

    en.wikipedia.org/wiki/Delta_(rocket_family)

    The Delta rocket family was a versatile range of American rocket -powered expendable launch systems that provided space launch capability in the United States from 1960 to 2024. Japan also launched license-built derivatives (N-I, N-II, and H-I) from 1975 to 1992. More than 300 Delta rockets were launched with a 95% success rate.

  8. Thor-Delta - Wikipedia

    en.wikipedia.org/wiki/Thor-Delta

    Failure (s) 1. First flight. 13 May 1960. Last flight. 18 September 1962. [edit on Wikidata] The Thor-Delta, also known as Delta DM-19 or just Delta was an early American expendable launch system used for 12 orbital launches in the early 1960s. A derivative of the Thor-Able, it was a member of the Thor family of rockets, and the first member of ...

  9. Geostationary transfer orbit - Wikipedia

    en.wikipedia.org/wiki/Geostationary_transfer_orbit

    EchoStar XVII · Earth. In space mission design, a geostationary transfer orbit (GTO) or geosynchronous transfer orbit is a highly elliptical type of geocentric orbit, usually with a perigee as low as low Earth orbit (LEO) and an apogee as high as geostationary orbit (GEO). Satellites that are destined for geosynchronous orbit (GSO) or GEO are ...

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