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PT4 (other)
PT4 or ''variant'' may refer to: * New Horizons PT4, aka 2014 MT69, a celestial object. * PT-4, a pre-World War II US Navy PT-boat. * '' Prison Tycoon 4: Supermax'' (2008 videogame) * PT4, a paratriathlon classification. {{Letter-Number Combination Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Horizons PT4
(internally designated in the context of the Hubble Space Telescope, and 7 in the context of the ''New Horizons'' mission) is a cold classical Kuiper belt object (KBO) and was formerly a potential flyby target for the ''New Horizons'' probe. The object measures approximately in diameter. Discovery and naming was discovered by the New Horizons KBO Search with the help of the Hubble Space Telescope (HST) because the object has a magnitude of 27.3, which is too faint to be observed by ground-based telescopes. Preliminary observations by the HST searching for New Horizons#Suitable KBOs, KBO flyby targets for the ''New Horizons'' probe started in June 2014, and more intensive observations continued in July and August. was first discovered in observations on June 24, 2014, during the preliminary observations, but it was designated 0720090F at the time, nicknamed "7" for short. Its existence as a potential target of the ''New Horizons'' probe was revealed by NASA in October 2014 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PT Boat
A PT boat (short for patrol torpedo boat) was a motor torpedo boat used by the United States Navy in World War II. It was small, fast, and inexpensive to build, valued for its maneuverability and speed but hampered at the beginning of the war by ineffective torpedoes, limited armament, and comparatively fragile construction that limited some of the variants to coastal waters. In the USN they were organized in Motor Torpedo Boat Squadrons (MTBRONs). The PT boat was very different from the first generation of torpedo boat, which had been developed at the end of the 19th century and featured a displacement hull form. These first generation torpedo boats rode low in the water, displaced up to 300 tons, and had a top speed of . During World War I Italy, the US, and UK developed the first high-performance gasoline-powered motor torpedo boats (often with top speeds over ) and corresponding torpedo tactics, but these projects were all quickly disbanded after the Armistice. World Wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
