Need help with Finding absolute magnitude

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    Absolute Magnitude
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Homework Help Overview

The discussion revolves around finding the absolute magnitude of a star using the provided period value, specifically focusing on the equation involving the variable P, which is given as 7 days.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants express confusion regarding the application of the relevant equation and the need for clarification on how to evaluate it. There are requests for assistance in plugging the value into the equation, with some participants questioning the original poster's understanding of the problem setup and the tools available for calculation.

Discussion Status

The discussion is ongoing, with participants providing guidance on how to approach the evaluation of the expression. There is a recognition of differing levels of familiarity with the forum's rules and the mathematical concepts involved.

Contextual Notes

Participants note the importance of defining variables clearly and adhering to forum rules regarding problem presentation. There is also mention of potential constraints related to the original poster's access to calculators capable of performing the necessary calculations.

Michael c17
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Homework Statement
Need to solve this equation
Relevant Equations
Mv = - [2.76 (log10(P) - 1.0)] - 4.16
P is = to 7 and I don't know how to get the absolute magnitude please help.
 
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Michael c17 said:
Homework Statement:: Need to solve this equation
Relevant Equations:: Mv = - [2.76 (log10(P) - 1.0)] - 4.16

P is = to 7 and I don't know how to get the absolute magnitude please help.
Please post the whole question as given to you. Define any variables that would only be obvious to someone versed in astronomy.
The "relevant equations " section is for standard equations, not any that only relate to the given problem. Maybe that is a standard equation.. I don't know.

And, per forum rules, please show some attempt, or at least provide your thinking so far.
 
I don't understand what your saying, there is the equation and 7 is P I just need someone to plug it in and give me Mv since I don't have a calculator that can do that. Sorry I'm not versed in your forum rules. I'm just trying to find the absolute magnitude of a star using only the period in days which is 7.
 
Michael c17 said:
I just need someone to plug it in and give me Mv
That's a key piece of information right there, that Mv (##M_v##?) is one variable, not two.
You confused me by saying you needed to solve the equation. What you are asking for is merely to evaluate an expression.

I find it hard to believe there exists any calculator that cannot do this. Just google online calculator and you will find several.
If you mean that you cannot do the whole expression in one hit, just do it in stages.
 
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@Michael c17, have you a smart-phone? My (low-end) phone has a calculator which includes 'advanced options' with log₁₀, brackets, trig' functions, etc. Check yours if you have one.
 

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