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486958 Arrokoth (provisional designation 2014 MU 69; formerly nicknamed Ultima Thule [a]) is a trans-Neptunian object located in the Kuiper belt.Arrokoth became the farthest and most primitive object in the Solar System visited by a spacecraft when the NASA space probe New Horizons conducted a flyby on 1 January 2019.
Ultima Thule primarily refers to: Thule , a Latin (and earlier Greek) name for an island north of Britain 486958 Arrokoth , a Kuiper belt object previously nicknamed “Ultima Thule” before its official naming, visited on January 1, 2019 by NASA's New Horizons spacecraft
The city-size object is made up of a pair of roughly spherical lobes, scientists dubbed the larger lobe "Ultima" and the smaller one "Thule." New Horizons images reveal odd shape of Ultima Thule ...
On August 28, 2015, 486958 Arrokoth (then known as (486958) 2014 MU 69 and nicknamed Ultima Thule) (PT1) was chosen as the flyby target. The necessary course adjustment was performed with four engine firings between October 22 and November 4, 2015. [183] [184] The flyby occurred on January 1, 2019, at 00:33 UTC.
The image was taken at 5:26 UT (12:26 a.m. EST) on Jan. 1, 2019, when the spacecraft was 4,109 miles (6,628 kilometers) from Ultima Thule and 4.1 billion miles (6.6 billion kilometers) from Earth. The angle between the spacecraft, Ultima Thule and the Sun – known as the “phase angle” – was 33 degrees.
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