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Stargazing Auxiliary
Latitude & Longitude Stargazing Calibrator
Best aim angle and astronomical twilight window for your location.
Try the tool
Astronomical twilight (start): ~01:02 UTC
Astronomical twilight (end): ~08:49 UTC
Recommended zenith aim: latitude 40.0° from horizon (facing celestial pole)
Best azimuth range: N through E for deep-sky targets
Tool principle
The celestial pole altitude equals observer latitude; astronomical twilight adds ~1.5 h to sunset and subtracts the same from sunrise.
Data source: Native algorithm.
User guide
- 1Enter latitude and longitude.
- 2Aim your mount at an altitude equal to your latitude toward the celestial pole for polar alignment.
- 3Wait for the astronomical twilight window for deep-sky imaging.
Frequently asked questions
Northern or southern pole?＋
Positive latitudes point to Polaris; negative to Sigma Octantis.