trans-neptunian objects arrokoth

    Caption: "This composite image of the primordial contact binary trans-Neptunian object (TNO)) (also a Kuiper Belt object (KBO)) Arrokoth (AKA Ultima Thule, AKA 2014 MU69) was compiled from data obtained by NASA's New Horizons spacecraft (2006jan19--) as it did a flyby of Arrokoth on 2019 Jan01. The image combines enhanced color data (close to what the human eye would see) with detailed high-resolution panchromatic pictures." (Somewhat edited.) Yes, Arrokoth is reddish (see Wikipedia: 486958 Arrokoth: Spectra and surface).

    Features:

    1. Arrokoth is the second TNO system to be observed close up. The first was Pluto and Pluto moon system.

    2. Arrokoth is thought to be a pristine Solar System planetesimal that formed close to beginning of the 4.57 Gyr BP

    3. See Trans-Neptunian object keywords below (local link / general link: trans_neptunian_objects_keywords.html):

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    Credit/Permission: NASA, Johns Hopkins University Applied Physics Laboratory (APL), Southwest Research Institute, Roman Tkachenko, 2019 (uploaded to Wikimedia Commons by User:Nrco0e, 2019) / Public domain.
    Image link: Wikimedia Commons: File:UltimaThule CA06 color 20190516.png.
    Local file: local link: trans_neptunian_objects_arrokoth.html.
    File: Solar System file: trans_neptunian_objects_arrokoth.html.