thanks for having an accurate library!

[phelbas]

Possibly I was using astronomia wrongly. Suncalc3 was fast and easy. but glad I've found the one that reproduces the gold standard, JPL Horizons. Is it the gold standard?

Cosinekitty Astronomy Library Test

Test Time: 2025-08-10T17:26:14.030Z
Observer: -32.7761216°, 149.8396389°

Cosinekitty Library Results:
Moon RA: 22.499087 hours
Moon Dec: -10.057977°

Accuracy Validation:
JPL Horizons (reference): Az=298.85°, El=51.81°
Cosinekitty astronomy-engine: Az=298.86°, El=51.83°
Errors: Az=0.01°, El=0.02°

Library Comparison Summary:

Cosinekitty: Az=298.86°, El=51.83° (errors: 0.01°, 0.02°) ← BEST
SunCalc3: Az=297.73°, El=52.06° (errors: 1.12°, 0.25°)
Astronomia: Az=306.90°, El=44.52° (errors: 8.05°, 7.29°) ← WORST