Mean Lunar Distance km Lookup
Independently verified lunar mean/epoch distance convention, not instantaneous geocentric/topocentric range. Exact independently documented reference matching, signed discrepancy retained. Model only, not an ephemeris, measured stellar identity or observational guarantee.
Description
A lunar-distance reference depends on a statistic and observational context.
A lunar-distance reference depends on a statistic and observational context.1
Comparing a supplied distance with that reference does not compute the Moon's orbit. Use Mean Lunar Distance km Lookup to evaluate the supplied inputs under the model explained below.
When to use Mean Lunar Distance km Lookup
Use Mean Lunar Distance km Lookup to evaluate the supplied inputs under the model explained below. Establish the units, measurement scope and model assumptions before entering values.
How to use Mean Lunar Distance km Lookup and understand its results
- Establish the units, measurement scope and model assumptions before entering values.
- Enter Caller verified lunar distance keys, Caller verified lunar distance values, Query lunar distance key, Observed lunar distance value using the field table and validation rules below, then run the tool.
- Read Caller reference value, Signed observed minus reference; 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 |
|---|---|---|---|
| callerVerifiedLunarDistanceKeys | Caller verified lunar distance keys | array of string | Required; constraints below |
| callerVerifiedLunarDistanceValues | Caller verified lunar distance values | array of number | Required; constraints below |
| queryLunarDistanceKey | Query lunar distance key | string | Required; constraints below |
| observedLunarDistanceValue | Observed lunar distance value | number | Required; constraints below |
Enter nonempty unique nonblank keys of at most 128 UTF-16 code units, aligned positive finite reference values, an exact query key and a positive finite observed value in the same declared units. Perform a case-sensitive key lookup and return the reference plus observed minus reference. Unknown keys fail. No reference catalog, unit conversion, uncertainty or applicability verification is installed.
reference=values[indexOfExactQuery(keys)]; discrepancy=observed−reference Use the field order, units and branch conditions described above.
| Output field | Meaning | Value type |
|---|---|---|
| callerReferenceValue | Exact selected caller numeric reference in the caller’s consistent unit. | number |
| signedObservedMinusReference | Signed observed minus selected reference in the same unit. | number |
{
"input": {
"callerVerifiedLunarDistanceKeys": [
"a",
"b"
],
"callerVerifiedLunarDistanceValues": [
2,
4
],
"queryLunarDistanceKey": "b",
"observedLunarDistanceValue": 5
},
"output": {
"callerReferenceValue": 4,
"signedObservedMinusReference": 1
}
}Limitations and assumptions
Comparing a supplied distance with that reference does not compute the Moon's orbit. 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 Planet Year Length Lookup for a related task: A planet's year needs an orbital-period convention and reference epoch.
Use Saros Cycle Eclipse Repeat Years for a related task: A repeat cycle can be represented by a number of matched synodic months.
References
-
Mean Lunar Distance km Lookup — tool.io
Similar or alternative tools
- Planet Year Length Lookup
A planet's year needs an orbital-period convention and reference epoch.
- Saros Cycle Eclipse Repeat Years
A repeat cycle can be represented by a number of matched synodic months.