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Because the orbit of Mars is considerably eccentric its brightness at opposition can range from magnitude −3.0 to −1.4. [14] The minimum brightness is about magnitude +1.6 [14] when Mars is on the opposite site of the Sun from the Earth. Rotational variations can elevate or suppress the brightness of Mars by 5% and global dust storms can ...
planet Venus: seen from Earth minimum brightness during transits. −2.94: planet Jupiter: seen from Earth maximum brightness [42] −2.94: planet Mars: seen from Earth maximum brightness [42] −2.5: Faintest objects visible during the day with naked eye when Sun is less than 10° above the horizon: −2.50: new moon: seen from Earth minimum ...
Mars' magnitude in particular changes with elongation: it can be as low as +1.8 when in conjunction near aphelion but at a rare favourable opposition it is as high as −2.9, which translates to seventy-five times brighter than its minimum brightness. As one moves further out, the difference in magnitude that correlates to the difference in ...
Mars −2.94 mag; Mercury −2.48 mag; Saturn −0.55 mag [2] Any exact order of the visual brightness of stars is not perfectly defined for four reasons: Stellar brightness is based on the apparent visual magnitude as perceived by the human eye, from
Reduces sky brightness during daylight observation of Venus. Increases contrast of ice and polar caps on Mars. Improves visibility of the Great Red Spot on Jupiter and other features in Jupiter atmosphere. Enhances white clouds and polar regions on Saturn. Medium blue: Enhances contrast of Moon. Increases contrast of faint shading of Venus clouds.
For some objects, such as the Moon (see lunar phases), Venus and Mercury the phase angle (as seen from the Earth) covers the full 0–180° range. The superior planets cover shorter ranges. For example, for Mars the maximum phase angle is about 45°. For Jupiter, the maximum is 11.1° and for Saturn 6°. [1]
Factor ()Multiple Value Item 0 0 lux 0 lux Absolute darkness 10 −4: 100 microlux 100 microlux: Starlight overcast moonless night sky [1]: 140 microlux: Venus at brightest [1]: 200 microlux
From one day to the next, the view of the Moon would change considerably for an observer on Mars than for an observer on Earth. The phase of the Moon as seen from Mars would not change much from day to day; it would match the phase of the Earth, and would only gradually change as both Earth and Moon move in their orbits around the Sun. On the ...