Flux Ratio To Magnitude
Calculator

Inputs

Magnitude difference Δm
-5

Results

Magnitude difference Δm
-5

Astronomy results

Magnitude difference Δm-5

formula-map diagram

Magnitude difference Δm
-5

Astronomical relationship

Formula

m₁ − m₂ = −2.5 log₁₀(F₁ / F₂)

= -5

Note

This result is a simplified model: it applies the displayed textbook formula to the values you entered, assuming ideal spherical bodies, circular orbits, blackbody radiation and perfect optics, and ignoring atmospheric seeing, relativistic corrections beyond those stated, cosmological models and measurement uncertainty. Use published ephemerides and catalogue data for real observations.

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