What is the absolute magnitude of a star that is 29 parsecs away and whose apparent magnitude is 6.3?

Answer

The absolute magnitude of a star that is 29 parsecs away and whose apparent magnitude is 6.3 can be calculated with the formula m - M = 5 log d - 5, where m = apparent magnitude, M = absolute magnitude, and d = distance.
Q&A Related to "What is the absolute magnitude of a star that..."
Your formula is not right. M = m - 5(log(d) - 1) as long as d is small relative to the size of the universe. Distance expressed in pasecs means of d = 10 parsecs, log(d) = 1 and the
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10 parsecs = 32.616 light-years.
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B. 10 parsecs http://en.wikipedia.org/wiki/Absolute_ma…
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