Kahale Observatory (KOBS)
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Mon Apr 20 06:50:46 2026
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19:29:16.25
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Mon Apr 20 13:50:46 2026
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Mon Apr 20 08:05:36 2026
Tue Apr 21 06:20:50 2026
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Tue Apr 21 01:02:02 2026
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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
CDSportal: ID objects
PixInsight Flow Charts
NED object info
Planetary AP (CloudyNights)
FOV Calculator
Minima of Algol
Oregon Dark Skies
Printable Sky Charts
Top Spring Targets
Ultimate Spring Sky Guide
Ultimate Summer Sky Guide
Ultimate Fall Sky Guide
Ultimate Winter Sky Guide
Top 100 DSOs
Time And Date