Utilities

Astronomical Tools

Quick converters and utilities for observational astronomy

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RA & Dec Converter
Convert Right Ascension and Declination from decimal degrees to sexagesimal coordinates (hh:mm:ss, dd:mm:ss).
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RA & Dec Converter
Convert Right Ascension and Declination from sexagesimal coordinates to decimal degrees.
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Julian Date Converter
Convert between calendar dates, Julian Dates (JD), and Modified Julian Dates (MJD).
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Wavelength ↔ Frequency
Convert between wavelength (Å), frequency (Hz), and energy (keV) for electromagnetic radiation.
Flux Density Converter
Convert between Fλ (erg cm⁻² s⁻¹ Å⁻¹) and Fν (erg cm⁻² s⁻¹ Hz⁻¹) flux densities.
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World Clocks
Live clocks for Salt Lake City, Warsaw, Paris, India, and New York — plus a customizable timezone.
⚠️ Disclaimer: These tools were created for personal use. You are welcome to use them, but I cannot take responsibility for any discrepancies that may arise. I would be glad to address any issues — feel free to email ashwanitapan@gmail.com.