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The LAG time between sunset andmoon set in minutes. This says howmany minutes one has to see the newmoon after sunset. One will have towait at least 20 minutes.Bernard Yallop’s Q-test for the moonand interpretive message “Easilyvisible.” Yallop worked for the BritishNautical Office.The character of the new moon for thismonth is shown here. The messagesvary, saying a chance of -1 day +1 day,none at all, or whether eye witnesseswill be needed to confirm a close casewith the new moon. In the odd caseswhere witnesses cannot confirm a closecase new moon, I issue a correctedchart to agree with the witnesses.Yallop’s test for the previous day, andinterpretive message.
The Julian day number and time of thenew moon at the “best time” forsighting. This is about half of LAG timeafter sunset. The details are moretechnical.The arc of vision. This is the verticalaltitude separation between the sunand moon in degrees. This relates tohow dark it is at the time of the newmoon, and thus affects visibility.The arc of light measurement indegrees. In this case 20.9. Thismeasures the angular distance betweenthe center of the sun and the center ofthe new moon. This value is related tothe visibility of the new moon.The width of the moon’s lighted portionThis figure is more technically correctthan the arc of light since it is topocentricallydetermined.
Page 1 and 2: This presentation will show you how
Page 3 and 4: A literal day is definedas dawn to
Page 7 and 8: The same night is in two positions
Page 9 and 10: To Read Roman days, you need toigno
Page 11: The time of the new moon is shown b
Page 15 and 16: I show the horizon here and atransp
Page 17 and 18: The reproduction of Revelation 12:1
Page 19 and 20: Complete Miss of Moon being under t
Page 21: The use of the sighted new moon to

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