Apparent to Absolute Magnitude Converter
Extinction-corrected absolute magnitude in same passband, independent measured extinction not inferred from distance. Model only, not an ephemeris, measured stellar identity or observational guarantee.
Description
Absolute magnitude refers brightness to the conventional reference distance.
Absolute magnitude refers brightness to the conventional reference distance.1
Observed apparent magnitude also needs a separately established extinction correction in the same band. Use Apparent to Absolute Magnitude Converter to evaluate the supplied inputs under the model explained below.
When to use Apparent to Absolute Magnitude Converter
Use Apparent to Absolute Magnitude Converter to evaluate the supplied inputs under the model explained below. Establish the units, measurement scope and model assumptions before entering values.
How to use Apparent to Absolute Magnitude Converter and understand its results
- Establish the units, measurement scope and model assumptions before entering values.
- Enter Apparent magnitude, Distance parsecs, Independently measured band extinction magnitudes using the field table and validation rules below, then run the tool.
- Read Absolute magnitude; interpret the units, signs, ordering and unknown-value placeholders described below.
- Correct reported input errors and rerun. Apply successful results according to their specific meanings and check the assumptions before using them in a decision.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| apparentMagnitude | Apparent magnitude | number | Required; constraints below |
| distanceParsecs | Distance parsecs | number | Required; constraints below |
| independentlyMeasuredBandExtinctionMagnitudes | Independently measured band extinction magnitudes | number | Required; constraints below |
Enter finite apparent magnitude, positive distance in pc and nonnegative independently measured extinction in the same band's magnitudes. Subtract the geometric distance modulus and extinction. No parallax inversion, reddening estimate or band transformation is provided.
absoluteMagnitude=apparentMagnitude−5log10(distancePc)+5−extinctionMagnitude Use the field order, units and branch conditions described above.
| Output field | Meaning | Value type |
|---|---|---|
| absoluteMagnitude | Absolute magnitude | number |
{
"input": {
"apparentMagnitude": 12,
"distanceParsecs": 100,
"independentlyMeasuredBandExtinctionMagnitudes": 2
},
"output": {
"absoluteMagnitude": 5
}
}Limitations and assumptions
Observed apparent magnitude also needs a separately established extinction correction in the same band. Apply the exact scope and assumptions explained above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse arrays fail validation. Domain-specific bounds, alignments and supported tokens are explained above; extremely large inputs or outputs can also be rejected. Input errors differ from successful false results, empty match lists and unknown-evidence placeholders.
Alternative or Complementary methods
Use Distance Modulus Parsecs Calculator for a related task: Distance modulus connects apparent and absolute magnitude through distance.
Use Magnitude Flux Ratio Calculator for a related task: Astronomical magnitudes express logarithmic brightness differences.
References
-
Apparent to Absolute Magnitude Converter — tool.io
Similar or alternative tools
- Distance Modulus Parsecs Calculator
Distance modulus connects apparent and absolute magnitude through distance.
- Magnitude Flux Ratio Calculator
Astronomical magnitudes express logarithmic brightness differences.