1. The
High Resolution Imaging Experiment (HiRISE) camera onboard NASA’s
Mars Reconnaissance Orbiter (MRO) should have taken images with a spatial resolution of 30 kilometers per pixel, the highest yet for 3I/ATLAS. The brightest pixel in these images can be used to infer the diameter of the nucleus of 3I/ATLAS, currently expected to be larger than 5 kilometers (as inferred
here).
2. The
High-Resolution Stereo Camera (HRSC) as well as the
OMEGA and
SPectroscopy for the Investigation of the Characteristics of the Atmosphere of Mars (SPICAM) spectrometers onboard Mars Express are expected to capture lower-resolution images and spectroscopic data on 3I/ATLAS.
3. The
Colour and Stereo Surface Imaging System (CaSSis) and the
NOMAD spectrometer onboard ESA’s
ExoMars Trace Gas Orbiter (TGO), are expected to produce color images and composition data. The
Infrared Spectrometer for ExoMars (ISEM) can be used to analyze the chemical composition of the plume of gas around 3I/ATLAS.
4.
The Imaging Ultraviolet Spectrograph (IUVS) onboard NASA’s
MAVEN spacecraft can provide UV imaging and spectroscopy of 3I/ATLAS.
5. Additional images and spectroscopic data are expected from the
Moderate Resolution Imaging Camera (MoRIC) onboard China’s
Tianwen-1 as well as the Emirates eXploration Imager (EXI) and Emirates Mars Infrared and Ultraviolet Spectrometers (EMIRS and EMUS) onboard the
Hope Orbiter of UAE’s Emirates Mars Mission.