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About 1.3 million years ago the object may have passed within a distance of 0.16 parsecs (0.52 light-years) to the nearby star TYC 4742-1027-1, but its velocity is too high to have originated from that star system, and it probably just passed through the system's Oort cloud at a relative speed of about 15 km/s (34,000 mph; 54,000 km/h).
Several options for sending a spacecraft to ʻOumuamua within a time-frame of 5 to 25 years were suggested. [89] [90] One option is using first a Jupiter flyby followed by a close solar flyby at 3 solar radii (2.1 × 10 ^ 6 km; 1.3 × 10 ^ 6 mi) in order to take advantage of the Oberth effect. [91]
A clear example of this is the eccentricities of the two known Interstellar objects as of October 2019, 1I/'Oumuamua. and 2I/Borisov. 'Oumuamua had an incoming V inf of 26.5 kilometres per second (59,000 mph), but due to its low perihelion distance of only 0.255 au, it had an eccentricity of 1.200.
‘Oumuamua is long gone from the inner solar system, but the mystery surrounding the interstellar interloper has been rekindled, thanks to a research paper written by two Harvard astronomers.
At a constant acceleration of 1 g, a rocket could travel the diameter of our galaxy in about 12 years ship time, and about 113,000 years planetary time. If the last half of the trip involves deceleration at 1 g, the trip would take about 24 years. If the trip is merely to the nearest star, with deceleration the last half of the way, it would ...
The Apollo 10 crew (Thomas Stafford, John W. Young and Eugene Cernan) achieved the highest speed relative to Earth ever attained by humans: 39,897 kilometers per hour (11,082 meters per second or 24,791 miles per hour, about 32 times the speed of sound and 0.0037% of the speed of light). [14] The record was set 26 May 1969. [14]
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[3] [65] Well before that, in about 90,000 years, Pioneer 10 will pass about 0.23 parsecs (0.75 light-years) from the late K-type star HIP 117795. [66] This is the closest stellar flyby in the next few million years of all the Pioneer , Voyager , and New Horizons spacecraft, which are leaving the Solar System.