Photometry & distance · μ = 5 log₁₀(d) − 5

Distance Modulus

The difference between apparent and absolute magnitude, which encodes distance. A modulus of five corresponds to 100 parsecs; each five magnitudes multiply the distance tenfold.

Distance (pc)

Distance modulus5mag

Formula: μ = 5 log₁₀(d) − 5

Worked example

With the default inputs, distance modulus evaluates to 5 mag — 100 pc → μ = 5. The validator recomputes this against the known value on every build, so the formula is checked, not asserted.

Highlights

›100 pc → μ = 5

Parallax

Knowledge connections

Associated withParallax

Sources

Facts on this topic will be cited from these primary and reference sources.

NASANational Aeronautics and Space Administration
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.

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Distance Modulus

Worked example

Highlights

The physics behind it

Knowledge connections

Sources

Distance Modulus

Worked example

Highlights

The physics behind it

Knowledge connections

Sources