13P (playwrights' Collective)
13P may refer to: * SpaceShipOne flight 13P, a flight of SpaceShip One * 13P/Olbers 13P/Olbers is a List of periodic comets, periodic comet with an orbital period of 69 years. It fits the classical definition of a Halley-type comet with a period between 20 and 200 years. The comet last passed perihelion 30 June 2024 and it was p ..., a comet See also * P13 (other) {{Letter-Number Combination Disambiguation ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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SpaceShipOne Flight 13P
Flight 13P of SpaceShipOne was its second powered flight, which occurred on April 8, 2004. The pilot was Peter Siebold. Details SpaceShipOne was released from White Knight at an altitude of 45,600 ft (13,900 m). Ignition was delayed by about two minutes to evaluate a shock-induced stall buffet. The rocket was lit at an altitude of 38,300 feet (11.7 km) for a 40-second burn. At burn-out, the Mach number was 1.6. The craft coasted to an apogee An apsis (; ) is the farthest or nearest point in the orbit of a planetary body about its primary body. The line of apsides (also called apse line, or major axis of the orbit) is the line connecting the two extreme values. Apsides perta ... altitude of 105,000 feet (32.0 km). During reentry the craft attained Mach 0.9. The craft switched to glider configuration at 40,000 feet (12.2 km). The craft returned to the Mojave Airport and landed safely. External linksSPACE.com article [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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13P/Olbers
13P/Olbers is a List of periodic comets, periodic comet with an orbital period of 69 years. It fits the classical definition of a Halley-type comet with a period between 20 and 200 years. The comet last passed perihelion 30 June 2024 and it was previously seen in 1956. The next perihelion is in 2094. Observational history Discovery Heinrich Wilhelm Matthias Olbers discovered the comet on 6 March 1815 and described it as small. The comet came to perihelion on 26 April 1815 and reached an apparent magnitude of about 5, and was faintly visible by naked eye. Its orbit was first computed by Carl Friedrich Gauss on March 31 as Parabolic trajectory, parabolic, and Friedrich Bessel calculated an orbital period of 73.9 years using observations from June. Calculations by other astronomers during that era resulted anywhere between 72 and 77 years. Modern solutions give an orbital period of 74.9 years for the 1815 Epoch (astronomy), epoch. 1887 There were unsuccessful searches for the ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |