What physical characteristic of Mars gives it its unique reddish or orange tint when observed near the Moon?

Answer

Iron oxide (rust) on its surface reflecting the sunlight

Mars is easily identified by its distinct reddish or orange hue, which is caused by iron oxide, commonly known as rust, present on its surface reflecting the Sun's light.

What physical characteristic of Mars gives it its unique reddish or orange tint when observed near the Moon?

#Videos

Venus reaches its greatest brightness near the Moon (21 to 27 April)

astronomystarMooncelestial bodybright object