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#1
November 28th 08, 08:34 PM
posted to alt.astronomy
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Red Dwarf @ 5000AU part2
I wuz wrong!
A red dwarf at 5000AU that was 10% as bright as the Sun would have the same apparent brightness of the Sun if the Sun itself were at 15,000 AU. [1/3 LY] Procyon and Capella are very apparent at much greater distances. Wiki sez a red dwarf could be 1/ 10,000th as bright as the Sun. Then, an apparent brightness for the Sun at a distance would translate to 31X further. 500,000AU [10 LY]. This getting too complicated. 
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#2
November 29th 08, 12:46 AM
posted to alt.astronomy
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Red Dwarf @ 5000AU part2
Does anyone care?
Saul Levy On Fri, 28 Nov 2008 15:34:29 -0500, "Theresa McCarty" wrote: I wuz wrong! A red dwarf at 5000AU that was 10% as bright as the Sun would have the same apparent brightness of the Sun if the Sun itself were at 15,000 AU. [1/3 LY] Procyon and Capella are very apparent at much greater distances. Wiki sez a red dwarf could be 1/ 10,000th as bright as the Sun. Then, an apparent brightness for the Sun at a distance would translate to 31X further. 500,000AU [10 LY]. This getting too complicated.
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#3
December 2nd 08, 02:48 AM
posted to alt.astronomy
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Red Dwarf @ 5000AU part2
Theresa McCarty wrote:
I wuz wrong! A red dwarf at 5000AU that was 10% as bright as the Sun would have the same apparent brightness of the Sun if the Sun itself were at 15,000 AU. [1/3 LY] Procyon and Capella are very apparent at much greater distances. Wiki sez a red dwarf could be 1/ 10,000th as bright as the Sun. Then, an apparent brightness for the Sun at a distance would translate to 31X further. 500,000AU [10 LY]. This getting too complicated. You're not taking "time" into consideration. -- ah
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