18.2. test4-5: Converting to and from
Julian day
This script tests JulianDate.fromDatetime() and JulianDate.datetime(), algorithms 4
and 5 respectively in Duffett-Smith.
test4-5
#!/usr/bin/env python
#================================================================
# test4-5: Test datetime <-> JulianDate conversion.
# For documentation, see:
# http://www.nmt.edu/tcc/help/lang/python/examples/sidereal/ims/
#----------------------------------------------------------------
import datetime
from sidereal import *
#--
# First make a datetime.datetime from 1985-02-17T06:00.
#--
dt = datetime.datetime ( 1985, 2, 17, 6 )
print "Input datetime:", dt
#--
# Convert to Julian Date and display.
#--
jd = JulianDate.fromDatetime(dt)
print float(jd)
#--
# Convert back to a datetime object and display that.
#--
check = jd.datetime()
print "Check datetime:", check
