Some daylight comets are so bright that they become visible during broad daylight circumstances (hence the name Daylight comet). Could they become so bright that their light is capable of creating a pseudo terminator on the moon's surface? (a false day-night boundary at the dark part of the normal terminator).
What I also want to know... Are there observations of daylight comets which show the crescent moon's nocturnal part as a silhouette against such a comet's bright tail? In other words, is the so-called ashen light on the moon's Earth-faced nocturnal part many times darker than a daylight comet's bright tail?
What was the brightest daylight comet ever observed? What magnitude? (still "below" the minus values?).
Edited ...
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