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This demo calculates the next 10 solar eclipses that are visible from a given location on the Earth, after a given date.
40 lines
1.7 KiB
Python
Executable File
40 lines
1.7 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# solar_eclipse.py - by Don Cross - 2023-10-03
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#
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# Example program for Astronomy Engine:
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# https://github.com/cosinekitty/astronomy
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#
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# Predicts the next 10 solar eclipses visible from a given location on the Earth.
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#
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import sys
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from astronomy import LocalSolarEclipseInfo, SearchLocalSolarEclipse, NextLocalSolarEclipse
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from astro_demo_common import ParseArgs
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def PrintEclipse(count: int, eclipse: LocalSolarEclipseInfo) -> None:
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print('Eclipse #{} : {}, obscuration = {:0.3f}'.format(count, eclipse.kind.name, eclipse.obscuration))
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print('{} Partial begins at altitude = {:0.2f}'.format(eclipse.partial_begin.time, eclipse.partial_begin.altitude))
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if eclipse.total_begin is not None:
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print('{} Total begins at altitude = {:0.2f}'.format(eclipse.total_begin.time, eclipse.total_begin.altitude))
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print('{} Peak at altitude = {:0.2f}'.format(eclipse.peak.time, eclipse.peak.altitude))
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if eclipse.total_end is not None:
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print('{} Total ends at altitude = {:0.2f}'.format(eclipse.total_end.time, eclipse.total_end.altitude))
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print('{} Partial ends at altitude = {:0.2f}'.format(eclipse.partial_end.time, eclipse.partial_end.altitude))
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print()
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if __name__ == '__main__':
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observer, startTime = ParseArgs(sys.argv)
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count = 0
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while count < 10:
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if count == 0:
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eclipse = SearchLocalSolarEclipse(startTime, observer)
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else:
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eclipse = NextLocalSolarEclipse(eclipse.peak.time, observer)
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# We ignore eclipses that occur while the center of the
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# Sun is below the horizon at the peak of the eclipse.
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if eclipse.peak.altitude > 0.0:
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count += 1
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PrintEclipse(count, eclipse)
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sys.exit(0)
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