Dawes Resolving Limit Arcsec
Named empirical Dawes 116/Dmmclose equal-brightness visual binary criterion, not Rayleigh wavelength/diffraction or seeing resolution. Model only, not an ephemeris, measured stellar identity or observational guarantee.
Description
Dawes' relation is an empirical double-star resolution heuristic tied to aperture.
Dawes' relation is an empirical double-star resolution heuristic tied to aperture.1
Seeing, target contrast and optical quality affect actual resolution. Use Dawes Resolving Limit Arcsec to evaluate the supplied inputs under the model explained below.
When to use Dawes Resolving Limit Arcsec
Use Dawes Resolving Limit Arcsec to evaluate the supplied inputs under the model explained below. Establish the units, measurement scope and model assumptions before entering values.
How to use Dawes Resolving Limit Arcsec and understand its results
- Establish the units, measurement scope and model assumptions before entering values.
- Enter Aperture diameter mm using the field table and validation rules below, then run the tool.
- Read Empirical dawes arcsec; 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 |
|---|---|---|---|
| apertureDiameterMm | Aperture diameter mm | number | Required; constraints below |
Enter positive aperture diameter in mm. Return 116/aperture as the empirical Dawes separation in arcsec. No wavelength, obstruction, seeing or detection guarantee is modeled.
DawesArcsec=116/apertureMm Use the field order, units and branch conditions described above.
| Output field | Meaning | Value type |
|---|---|---|
| empiricalDawesArcsec | Empirical dawes arcsec | number |
{
"input": {
"apertureDiameterMm": 100
},
"output": {
"empiricalDawesArcsec": 1.16
}
}Limitations and assumptions
Seeing, target contrast and optical quality affect actual resolution. 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 Light Gathering Power vs Eye Calculator for a related task: Clear collecting area and optical throughput affect relative photon collection.
Use Eyepiece Exit Pupil mm Calculator for a related task: Exit-pupil diameter connects aperture with angular magnification.
References
-
Dawes Resolving Limit Arcsec — tool.io
Similar or alternative tools
- Light Gathering Power vs Eye Calculator
Clear collecting area and optical throughput affect relative photon collection.
- Eyepiece Exit Pupil mm Calculator
Exit-pupil diameter connects aperture with angular magnification.