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The faintest star visible to the naked eye has an apparent magnitude of about?
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∙ 13y ago
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∙ 13y ago
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What is the magnitude of the sun?
The apparent magnitude of the Sun is -26.73. (Yes negative)The absolute magnitude of the Sun is 4.83See related question for the difference between absolute and apparent magnitude.For comparison at maximum brightness.Full Moon -12.6Venus -3.8Mars - 3Sirius -1.47Ganymede 4.6Object visible with the naked eye 6.5
What is the farthest planet that can be seen with the naked eye?
uranus, though it can be barely seen from the naked eye.Neptune is too dim to see with the naked eye, but people with good eyes who know where to look can spot Uranus on a clear dark night (at its brightest it has an apparent magnitude of around 5.5).Saturn.Uranus should be visible for those with exceptional eyesight in areas with exceptionally dark skies as its maximum apparent magnitude is 5.32 and the faintest objects are those with apparent brightness around 7. Neptune never geta brighter than 7.78.
How much more light does the sun give off than an object with thte least apparent magnitude that can be viewed by the naked eye?
How much more light does the sun give off than an object with the least apparent magnitude that can be viewed by the naked eye
What is the difference in the apparent magnitude of the sun and an object with the greatest apparent magnitude that can be viewed by the naked eye?
Sun's apparent visual magnitude: - 26.7Full moon's apparent visual magnitude: - 12.6Difference: The sun is 14.1 magnitudes brighter than the full moon. (Brightness ratio of 50,120)
What is magnitude of proxima star?
Alpha Centauri ... the brightest star in the constellation "Centaurus" ... has a visual magnitude of 0.00. Alpha Centauri is a triple star ... a binary yellow dwarf (G2V) circled by an orange dwarf (K1V), with a much smaller red dwarf (M5.5Ve) orbiting the pair at a greater distance. The stars are not visually resolvable, and the visual magnitude of 0.00 includes the light from all three components. The faintest of Alpha Centauri's three stars, Proxima, is the star closest to the sun, at about 4.2 light-years. Proxima's apparent magnitude is about 11 (very much too faint to see with the naked eye, even if A and B weren't almost right on top of it from our viewpoint), and its absolute magnitude is an even more dismal 15.5.
Is 51 Pegasi visible to the naked eye?
Yes, but only if the conditions are right. 51 Pegasi has an apparent magnitude [See Link] of 5.49. The faintest object the naked eye can see, has an apparent magnitude of 6.5 (in perfect conditions). Even with binoculars, the faintest object is 9.5. The larger the apparent magnitude, the dimmer the object is. Our Sun has an apparent magnitude of -26.73 (yes minus)
How bright is the constellation phoenix?
Not very. The brightest star Alpha Phoenicis [See Link] has an Apparent Magnitude [See Link] of only 2.6. For reference. The brighter an object appears, the lower the value of its magnitude. Apparent Magnitude -12.6 (Yes negative) = The brightness of a full moon. Apparent Magnitude 3 = Faintest stars visible in an urban neighborhood with the naked eye.
How bright is the faintest star?
Just barely glowing a dull brown. Without a telescope most people in urban areas can see stars of apparent magnitude 4. The limit of naked eye obseervations lies close to magnitude 6.8.
The amount of light reaching us from a star?
The amount of light, or brightness, of a star is measured by it magnitude - the lower the magnitude the brighter the object. The following gives an idea of the range when measured in visible light: The sun (as viewed from Earth) is at a magnitude of -26.73The darkest object visible to the naked eye (under very dark conditions) is at around magnitude 7.7The faintest visible object that can be seen by the Hubble Space Telescope is around magnitude 31.
What is the magnitude of the sun?
The apparent magnitude of the Sun is -26.73. (Yes negative)The absolute magnitude of the Sun is 4.83See related question for the difference between absolute and apparent magnitude.For comparison at maximum brightness.Full Moon -12.6Venus -3.8Mars - 3Sirius -1.47Ganymede 4.6Object visible with the naked eye 6.5
What is the narked eye limit for apparent magnitude in an area with dark skies?
Under ideal conditions, the limit is about 6m. That's how the "m" was originally defined - 1m for the brightest stars, 6m for the faintest that could be seen with the naked eye. (However, with the modern definition, the brightest stars have an apparent magnitude of less than 1m - even negative magnitudes.)
What is the farthest planet that can be seen with the naked eye?
uranus, though it can be barely seen from the naked eye.Neptune is too dim to see with the naked eye, but people with good eyes who know where to look can spot Uranus on a clear dark night (at its brightest it has an apparent magnitude of around 5.5).Saturn.Uranus should be visible for those with exceptional eyesight in areas with exceptionally dark skies as its maximum apparent magnitude is 5.32 and the faintest objects are those with apparent brightness around 7. Neptune never geta brighter than 7.78.
How big is 6.6 magnitude?
In the context of stars, a magnitude is not a measure of size but of brightness or apparent brightness. The apparent magnitude of the sun is -27 while Sirius, the brightest star has a magnitude of only -1.4: negative magnitudes are more bright, and stars with magnitudes greater than 6.5 are not visible to the naked eye. However, the sun is a star of modest modest size compared with some of the giants and supergiants.
What is apparent magnatude?
It means "apparent" - visible to the naked eye. It is the magnitude of an object as viewed from Earth. The Sun has an apparent magnitude of -26.73 because it is very close to us. However, Sirius, which is actually more luminous, has an apparent magnitude of -1.46 because it is further away from Earth. For this reason we also use absolute magnitude, which is the luminosity of an object at the same distance. Using absolute scales. The Sun has a value of 4.85 and Sirius has a value of 1.42. (NB: The lower the value, the more luminous an object is)
Is Gliese 581 visible to the naked eye?
Gliese 581 is a red dwarf star located about 20.3 light-years away from Earth in the constellation Libra. It has been of interest to astronomers due to the discovery of several exoplanets orbiting around it, some of which were initially thought to be potentially within the habitable zone of the star. However, Gliese 581 itself is not visible to the naked eye from Earth. It is a relatively dim star, and its apparent magnitude is around 10.6, which is far too faint to be seen without the aid of a telescope. Only the very brightest stars, planets, and the Moon are visible to the naked eye, generally having an apparent magnitude of around 6 or lower. To observe stars like Gliese 581, a telescope is required. Even then, the star might not appear as a discernible point of light but rather as a small, faint spot in the telescope's field of view.
How do they know that Andromeda is out there?
At an apparent magnitude of 3.4, the Andromeda Galaxy is one of the brightest Messier objects, making it visible to the naked eye on moonless nights even when viewed from areas with moderate light pollution.
Can you see novas?
Yes, but they are relatively faint. The last one that was just visible with the naked eye was V382 Velorium in 1999 with an apparent magnitude of +2.6. See link for a full list of Nova explosions
