Date, Time, and Angle Functions
The functions listed below are useful for working with coordinates and time. Some functions compute quantities, such as Julian Date whereas most perform conversions beween date, time, and angle in various formats, such as converting DMS to degress, and vice versa. Some classes such as CImage include several similar methods.
Calculates the airmass from celestal coordinates and time. |
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Calculates the standard Julian Date |
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Calculates the heliocentric Julian Date which corrects the Julian Date for light travel time to the Sun. |
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Calculates the Modified Julian Date which drops the most significant digits of the Julian Date. |
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Formats year, month, and day to a string. |
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Formats a date string in containing various combinations of year, month, and day to a proper date string. |
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Converts a decimal Julian Date to two strings, one containing the day, year, and month, and the other containing hours, minutes, and seconds. |
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Converts a decimal Julian Date to six numbers for the day, year, month, hours, minutes, and seconds. |
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Converts a date string containing year, month, and day to year, month, and day. |
Calculates the local sidereal time from coordinates and location on Earth. |
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Converts a date string to year, month, and day. |
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Converts the year, month, and day to the day of week. |
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Formats a time string in containing various combinations of hours, minutes, and seconds to a proper time string. |
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Formats hours, minutes, and seconds to a proper time string. |
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Converts a decimal Julian Date to two strings, one containing the day, year, and month, and the other containing hours, minutes, and seconds. |
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Converts a decimal Julian Date to six numbers for the day, year, month, hours, minutes, and seconds. |
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Converts a time string containing hours, minutes, and seconds to decimal hours. |
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Converts decimal hours to a time string containing hours, minutes, and seconds. |
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Converts a time string to hours, minutes, and seconds. |
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Converts decimal hours to hours, minutes, and seconds. |
Calculates the airmass from coordinates and time. |
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Calculates the spherical angle between coordinates on the sky. |
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Converts decimal degrees to a string containing degrees, minutes, and seconds. |
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Converts decimal degrees to a string containing hours, minutes, and seconds. |
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Converts an angle string containing degrees, minutes, and seconds to decimal degrees. |
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Converts time in degrees, minutes, and seconds to a string. |
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Formats an angle string containing various combinations of degrees, minutes, and seconds to a proper angle string. |
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Converts a time string containing hours, minutes, and seconds to decimal degrees. |
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Converts a time string containing hours, minutes, and seconds to decimal hours. |
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Converts decimal hours to a time string containing hours, minutes, and seconds. |
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Converts a decimal degrees 3 numbers for hours, minutes, and seconds. |
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Converts a degrees string to degrees, minutes, and seconds. |
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Converts a time string to hours, minutes, and seconds. |
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Converts decimal hours to hours, minutes, and seconds. |
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