Magnitudes Flashcards
1
Q
What is apparent magnitude (𝓂)?
A
The magnitude of a celestial object as it is actually measured from earth
2
Q
What is absolute magnitude (ℳ)?
A
The apparent magnitude the star would have from a distance of 10 pc
3
Q
What does an apparent magnitude (𝓂) less than 0 indicate?
A
That the star is bright
4
Q
What does an apparent magnitude (𝓂) greater than 0 indicate?
A
That the star is faint
5
Q
How are the apparent magnitudes of 2 objects related to their apparent brightnesses?
A
b1/b0 = 10-0.4(𝓂1 - 𝓂0)
OR
𝓂1 - 𝓂0 = -2.5 log10(b1/b0)
where 𝓂1 and 𝓂0 are the apparent magnitudes and b1 and b0 are the apparent brightnesses
6
Q
How are the apparent magnitudes of 2 objects related to their apparent brightnesses?
A
b1/b0 = 10-0.4(m1 m0)
OR
m1 - m0 = -2.5 log10(b1/b0)
where
