Opposition Brightness Enhancement Factor
Same-passband measured opposition/reference flux contrast, no automatic causal opposition-surge attribution or universal planet factor. Model only, not an ephemeris, measured stellar identity or observational guarantee.
Description
An opposition brightness comparison needs fluxes in the same band and measurement scope.
An opposition brightness comparison needs fluxes in the same band and measurement scope.1
A flux ratio does not isolate the physical opposition effect from other observing conditions. Use Opposition Brightness Enhancement Factor to evaluate the supplied inputs under the model explained below.
When to use Opposition Brightness Enhancement Factor
Use Opposition Brightness Enhancement Factor to evaluate the supplied inputs under the model explained below. Establish the units, measurement scope and model assumptions before entering values.
How to use Opposition Brightness Enhancement Factor and understand its results
- Establish the units, measurement scope and model assumptions before entering values.
- Enter Observed opposition flux, Independent same band reference flux using the field table and validation rules below, then run the tool.
- Read Observed enhancement factor, Signed magnitude brightening; 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 |
|---|---|---|---|
| observedOppositionFlux | Observed opposition flux | number | Required; constraints below |
| independentSameBandReferenceFlux | Independent same band reference flux | number | Required; constraints below |
Enter positive observed opposition and matched reference fluxes in one band and consistent units. Return observed/reference and −2.5log10(ratio) in magnitudes. Brighter observed flux gives a negative magnitude change. No distance, phase or atmospheric correction is applied.
enhancement=observedFlux/referenceFlux; signedMagnitudeChange=−2.5log10(enhancement) Use the field order, units and branch conditions described above.
| Output field | Meaning | Value type |
|---|---|---|
| observedEnhancementFactor | Observed enhancement factor | number |
| signedMagnitudeBrightening | Signed magnitude brightening | number |
{
"input": {
"observedOppositionFlux": 120,
"independentSameBandReferenceFlux": 100
},
"output": {
"observedEnhancementFactor": 1.2,
"signedMagnitudeBrightening": -0.19795311511906205
}
}Limitations and assumptions
A flux ratio does not isolate the physical opposition effect from other observing conditions. 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 Supermoon Size Increase Percent Check for a related task: An apparent lunar size increase requires an explicit comparison observation.
Use Saros Cycle Eclipse Repeat Years for a related task: A repeat cycle can be represented by a number of matched synodic months.
References
-
Opposition Brightness Enhancement Factor — tool.io
Similar or alternative tools
- Supermoon Size Increase Percent Check
An apparent lunar size increase requires an explicit comparison observation.
- Saros Cycle Eclipse Repeat Years
A repeat cycle can be represented by a number of matched synodic months.