Author Topic: When do you "Feel" it should be Full (New) Moon ?  (Read 173 times)

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Offline the beteljuice

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When do you "Feel" it should be Full (New) Moon ?
« on: April 24, 2019, 01:21:08 AM »
the beteljuice is experimenting with some code for various topocentric Moon data.

ie. As seen by the observer.

So when (to the casual visitor) is New Moon ?

Various sites / progs will calculate it to the second, but ....
In an ordinary calendar, Full Moon is the local day in which that moment occurred.
Further - the chances are any (numbered) moon graphic will be covering the 'moonday' (which is NOT the same as the local day) and thus will display Full Moon +/- 12 hours of the moonday cycle.
or yet  another way of looking at it is a 24 hour period = 3.75% of illumination (98.214% >  1.785%)

So ... regardless of the graphic, when do you 'feel' you should be advised it's a Full (New) Moon ?

Imagine what you will KNOW tomorrow !

Offline mcrossley

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Re: When do you "Feel" it should be Full (New) Moon ?
« Reply #1 on: April 24, 2019, 03:53:56 AM »
Always a tricky one this. For one example, what if the event occurs whilst the moon is below the horizon during the day. Visually both the night before and the night after the actual event will be equally full moons.

Offline galfert

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Re: When do you "Feel" it should be Full (New) Moon ?
« Reply #2 on: April 24, 2019, 04:58:12 AM »
I feel it should be indicated differently for a calendar than for an electronic display.

For a calendar it should be just the one day when the full moon occurs.

For an electronic display it should be the 24 period covering whatever span of the 2 days it falls on. But I think it would be interesting to have some extra information. Like you could show full moon and next to it a Beginning indicator and then after the exact moment an Ending indicator. You can even add a number to each. Like Beginning - 12 and then all the way down to the hour when it actually happens becomes Beginning - 0 followed by Ending +0 at the exact minute when it happens. Since seeing + and - 0 is weird as it doesn't have a sign you could actually add some decimal precision making it - 0.9 through - 0.1 and then at 0.0 you say neither Beninning nor Ending but you say Actual 0 for just 6 minutes.
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