Mission type | Technology |
---|---|
Operator | USAF |
COSPAR ID | 1963-042B [1] |
SATCAT no. | 682 |
Spacecraft properties | |
Bus | P-11 |
Manufacturer | Lockheed Martin / MIT |
Launch mass | 60 kilograms (130 lb) |
Start of mission | |
Launch date | October 29, 1963, 21:19 UTC [2] |
Rocket | Thor SLV-2A Agena D 386 |
Launch site | Vandenberg SLC-1W |
End of mission | |
Deactivated | May 23, 1965 |
Orbital parameters | |
Reference system | Geocentric |
Regime | Low Earth |
Eccentricity | 0.02201 |
Perigee altitude | 285 kilometres (177 mi) |
Apogee altitude | 585 kilometres (364 mi) |
Inclination | 89.9° |
Period | 93.4 minutes |
Epoch | October 29, 1963 |
Hitchhiker 2 (or P-11 4202, P-11 AS and OPS 3316) was a satellite launched by U.S. Air Force. It was launched with the aim of studying and measuring cosmic radiation. The satellite was the second successful satellite of the P-11 program, following the failure of the first Hitchhiker satellite in March 1963. It was launched on October 29, 1963 from Vandenberg Air Force Base, California, on a Thor-Agena launch vehicle.
In the context of spaceflight, a satellite is an object that has been intentionally placed into orbit. These objects are called artificial satellites to distinguish them from natural satellites such as Earth's Moon.
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The electron is a subatomic particle, symbol
e−
or
β−
, whose electric charge is negative one elementary charge. Electrons belong to the first generation of the lepton particle family, and are generally thought to be elementary particles because they have no known components or substructure. The electron has a mass that is approximately 1/1836 that of the proton. Quantum mechanical properties of the electron include an intrinsic angular momentum (spin) of a half-integer value, expressed in units of the reduced Planck constant, ħ. Being fermions, no two electrons can occupy the same quantum state, in accordance with the Pauli exclusion principle. Like all elementary particles, electrons exhibit properties of both particles and waves: they can collide with other particles and can be diffracted like light. The wave properties of electrons are easier to observe with experiments than those of other particles like neutrons and protons because electrons have a lower mass and hence a longer de Broglie wavelength for a given energy.
A proton is a subatomic particle, symbol
p
or
p+
, with a positive electric charge of +1e elementary charge and a mass slightly less than that of a neutron. Protons and neutrons, each with masses of approximately one atomic mass unit, are collectively referred to as "nucleons".
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