High Proper Motion Star Threshold 180 mas/yr Flag Checker
Measured total angular-motion threshold screen, historical 180 title not immutable standard or source identity. Caller independently establishes frames, units, epoch, covariance and instrument context; not an identity, association or astrometric quality certification.
Description
A high-proper-motion flag compares a measured magnitude with a chosen catalog threshold.
A high-proper-motion flag compares a measured magnitude with a chosen catalog threshold.1
That flag does not establish distance, velocity or catalog reliability. Use High Proper Motion Star Threshold 180 mas/yr Flag Checker to evaluate the supplied inputs under the model explained below.
When to use High Proper Motion Star Threshold 180 mas/yr Flag Checker
Use High Proper Motion Star Threshold 180 mas/yr Flag Checker to evaluate the supplied inputs under the model explained below. Establish the units, measurement scope and model assumptions before entering values.
How to use High Proper Motion Star Threshold 180 mas/yr Flag Checker and understand its results
- Establish the units, measurement scope and model assumptions before entering values.
- Enter Observed total proper motion mas per year, Caller high motion threshold mas per year using the field table and validation rules below, then run the tool.
- Read Caller high motion flag, Signed threshold difference mas per year; 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 |
|---|---|---|---|
| observedTotalProperMotionMasPerYear | Observed total proper motion mas per year | number | Required; constraints below |
| callerHighMotionThresholdMasPerYear | Caller high motion threshold mas per year | number | Required; constraints below |
Enter nonnegative total motion and positive caller threshold in mas/year. Flag observed≥threshold and return observed−threshold as a signed difference. No universal high-motion cutoff, catalog query or velocity conversion occurs.
flag=motion≥callerThreshold; difference=motion−callerThreshold Use the field order, units and branch conditions described above.
| Output field | Meaning | Value type |
|---|---|---|
| callerHighMotionFlag | Caller high motion flag | boolean |
| signedThresholdDifferenceMasPerYear | Signed threshold difference mas per year | number |
{
"input": {
"observedTotalProperMotionMasPerYear": 180,
"callerHighMotionThresholdMasPerYear": 180
},
"output": {
"callerHighMotionFlag": true,
"signedThresholdDifferenceMasPerYear": 0
}
}Limitations and assumptions
That flag does not establish distance, velocity or catalog reliability. 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 Proper Motion Significance Sigma per Year Classifier for a related task: A component's significance compares signed motion with its independently measured uncertainty.
Use Proper Motion Tangential Velocity Calculator for a related task: Proper motion and distance together determine a tangential speed under consistent units.
References
Similar or alternative tools
- Proper Motion Significance Sigma per Year Classifier
A component's significance compares signed motion with its independently measured uncertainty.
- Proper Motion Tangential Velocity Calculator
Proper motion and distance together determine a tangential speed under consistent units.