Observations constrained by availability of bright stars in IR (or satellites). Antares and Pollux are the best candidates (late type and close to the ecliptic). Spica and Regulus are bright but very blue. Adjusting the optimal integration times to be used during stellar occultations shall be performed during instrument boresight checks during the cruise where stars are used as targets (see MAJIS_BORESIGHT_ALIGNEMENT). If slit pointing is compatible, UVS co-ride for observing UV bright stars is also an option.
any rule that is used to schedule the observation: repetition rules, continuous (plasma instruments), one-off, every orbit, every day, etc