- #1

dalai_lala

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Ummm... never mind, we found it...

Given Proxima Centauri with parallax angle of 0.769" and apparent bolometric magnitude of 11.1... what is its absolute magnitude?

I get that I should use m-M = 5 log10(d/10 pc) and I understand that d = 1/p".

What I really need to know is: what do I use to get apparent magnitude? After I get m I can plug and chug, and I'm fine with that... but how do I get m?

Apparent magnitude was not given and I can't look it up for a quiz or test.

so far...

m-M = 5 log10 [(1/0.769)/10]

or M = m - 5 log10 (.1300)

But I'm still stuck on where to go for m...

Thanks!

Lori the Totally Lost English Major

## Homework Statement

Given Proxima Centauri with parallax angle of 0.769" and apparent bolometric magnitude of 11.1... what is its absolute magnitude?

## Homework Equations

I get that I should use m-M = 5 log10(d/10 pc) and I understand that d = 1/p".

What I really need to know is: what do I use to get apparent magnitude? After I get m I can plug and chug, and I'm fine with that... but how do I get m?

Apparent magnitude was not given and I can't look it up for a quiz or test.

## The Attempt at a Solution

so far...

m-M = 5 log10 [(1/0.769)/10]

or M = m - 5 log10 (.1300)

But I'm still stuck on where to go for m...

Thanks!

Lori the Totally Lost English Major

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