Coefficients

Class

class badidatetime._coefficients.Coefficients[source]

Bases: object

Provides the coefficients used for finding the Julian Period day in the badi_calendar.BahaiCalendar class and the POSIX timestamp in the datetime.datetime class.

P1 = ((-1783, -1747), (-1651, -1615), (-1499, -1483), (-1383, -1347), (-1251, -1215), (-1099, -1083), (-983, -947), (-851, -815), (-699, -683), (-583, -547), (-451, -415), (-299, -283), (-179, -143), (-47, -11), (101, 117), (213, 249), (345, 381), (501, 513), (609, 645), (741, 777), (901, 909), (1005, 1041), (1137, 1162))
P1100 = ((-1699, -1683), (-1299, -1283), (-899, -883), (-499, -483), (-99, -79), (301, 313), (701, 709), (1101, 1105))
P1110 = ((-1799, -1783), (-1683, -1651), (-1399, -1383), (-1283, -1251), (-999, -983), (-883, -851), (-599, -583), (-483, -451), (-199, -179), (-79, -47), (201, 213), (313, 345), (601, 609), (709, 741), (1001, 1005), (1105, 1137))
P2 = ((-1519, -1499), (-1119, -1099), (-719, -699), (-319, -299), (85, 101), (477, 501), (873, 901))
P2111 = ((-1747, -1715), (-1615, -1583), (-1483, -1451), (-1347, -1315), (-1215, -1183), (-1083, -1051), (-947, -915), (-815, -783), (-683, -651), (-547, -515), (-415, -383), (-283, -243), (-143, -111), (-11, 21), (117, 149), (249, 281), (381, 413), (513, 545), (645, 677), (777, 809), (909, 941), (1041, 1073))
P2211 = ((-1843, -1815), (-1715, -1699), (-1583, -1551), (-1451, -1415), (-1315, -1299), (-1183, -1151), (-1051, -1019), (-915, -899), (-783, -751), (-651, -619), (-515, -499), (-383, -351), (-243, -211), (-111, -99), (21, 53), (149, 185), (281, 301), (413, 445), (545, 577), (677, 701), (809, 841), (941, 973), (1073, 1101))
P2221 = ((-1815, -1799), (-1551, -1519), (-1415, -1399), (-1151, -1119), (-1019, -999), (-751, -719), (-619, -599), (-351, -319), (-211, -199), (53, 85), (185, 201), (445, 477), (577, 601), (841, 873), (973, 1001))
_get_day_coeff(year: int) → int[source]

Generate the coefficients for correcting Badí’ vernal equinox dates.

Note

General ranges are determined with:
./contrib/misc/badi_jd_tests.py -p -S start_year -E end_year

Where -S is the 1st year and -E is the nth year + 1 that needs to be process. Use the following command to test the results of each segment. ./contrib/misc/badi_jd_tests.py -qXS start_year -E end_year

Full range is -1842 to 1161.

Parameters:

year (int) – The year to find a coefficient for.

Returns:

The coefficient.

Return type:

int