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Photometry
- Process of measuring apparent brightness of stars
5-step Magnitude Scale
- Based on apparent magnitude ()
- 1 --> 6
- Brightest --> dimmest
- Larger magnitude --> less luminosity
- 5 steps in magnitude equals 100 times in luminosity
- 1 step in magnitude is 2.512 times in luminosity
Equations
- The following equation allow us to calculate the difference in brightness of stars
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- and are magnitudes of stars
- and are the brightness of stars