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Message: <blockquote data-quote="Hriston" data-source="post: 9770046" data-attributes="member: 6787503">This is from an FAQ on ESA's website esa.int:In the coming months, ESA will turn interplanetary voyagers such as Mars Express, ExoMars Trace Gas Orbiter and the Jupiter Icy Moons Explorer (Juice) in the direction of the comet to make further observations with eyes from all over the Solar System.And there's also this:When and how will ESA’s Mars’s missions observe 3I/ATLAS? ESA’s Mars Express and ExoMars Trace Gas Orbiter (TGO) will observe the comet with several instruments around its closest approach to Mars on 3 October 2025. On that date, 3I/ATLAS will be around 30 million km from Mars. The instruments turning their eyes to the comet include Mars Express’s High Resolution Stereo Camera (HRSC) and ExoMars TGO’s Colour and Stereo Surface Imaging System (CaSSIS) – both cameras that are typically used to photograph the Red Planet. We will also attempt to measure the spectrum of light from the comet using Mars Express’s OMEGA and SPICAM spectrometers and TGO’s NOMAD spectrometer, though it is not certain whether the comet and its tail will be bright enough for a full spectral characterisation. The observations may give us hints about the volatile activity and composition of 3I/ATLAS. As Mars Express and ExoMars TGO are designed to image the martian surface just a few hundred to thousand kilometres below, we do not expect spectacular images of a (relatively) small comet 30 million km away; the comet itself will cover less than a pixel in the images. We expect better images of the halo of gas around the comet and the tail that streams behind it. The success of the observations also depends on how bright the comet is as it approaches the Sun, which in turn depends largely on how much water it contains and how much escapes in the form of a tail.Higher resolution images with a pixel size of 30 km should have been captured by the HiRISE camera carried by NASA's Mars Reconnaissance Orbiter, which might be sufficient to determine the object's actual size.</blockquote>

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