Kahale Observatory (KOBS)
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Wed Apr 30 17:16:03 2025
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6:36:38.49
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Thu May 1 00:16:03 2025
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Messier Objects
Compute Sky Background from Star mag
Calc Std Background Flux and Sky Background
Bortle Scale
Spreadsheets for Astronomical Calculations
Sky Brightness Chart
Calculate Magnitude Limits
Calculate Telescope Capabilities (limiting mag, etc)
Camera Suitability (Binning)
Separating Stars and Deep Sky Objects
FOV Calculator
Minima of Algol
Oregon Dark Skies
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Top Spring Targets
Ultimate Spring Sky Guide
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Ultimate Winter Sky Guide
Top 100 DSOs
Time And Date