tag of the age of the moon (in days)

P C

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Mar 30, 2021, 4:41:15 AM3/30/21

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Hello, again me ;)

I am looking for the tag of the age of the moon (in days) that goes from New Moon in New Moon in 29 days. This means that the full moon is between the 14th and the 15th day.

NB: Pyephem is installed

Thank you !

Tom Keffer

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Mar 30, 2021, 5:06:24 AM3/30/21

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Could you use

#set $days=$almanac.moon.moon_fullness * .2953
<p>The moon is $days days old.</p>

.2953 is the length of the lunar cycle, divided by 100.

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Blaise

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Mar 30, 2021, 5:58:24 AM3/30/21

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Well no, Tom,

This tag gives "the lighting" of the moon: 100% = full moon, 0% = new moon.
So it goes from 0% to 0% (new moon) via 100% (full moon). It does not indicate the age of the moon, since we do not know where we come from and to what we are going.
I had the same idea: "#set $md = int (($almanac.moon_fullness / 3.45) +.5)"

PS: What is the difference between "$almanac.moon_fullness" and "$almanac.moon.moon_fullness"?

An other idea ?

thank you,

Pascal

Le 30-03-21 à 11:05, Tom Keffer a écrit :

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Blaise

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Mar 30, 2021, 6:13:50 AM3/30/21

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This because I have 29 images of the moon in its different phases :

#set $md = int (($almanac.moon_fullness / 3.45) +.5)

#set $fmd = "/images/lune- "+ str ($md) +" .png "
<div class = "dans_entete">
Lune & NBSP;: & nbsp; $almanac.moon_phase <br> $almanac.moon_fullness & nbsp;% <br>
<br> <img alt = "$md + '" src = "$ fmd" width = "50%">
</ div>

Le 30-03-21 à 11:05, Tom Keffer a écrit :

Could you use

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gjr80

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Mar 30, 2021, 6:52:48 AM3/30/21

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I have a similar requirement in WeeWX-WD. I use something along the lines of:

#set $moonAge = $time.gmtime($current.dateTime.raw - $almanac.previous_new_moon.raw)
#set $moonDays = int(round(($current.dateTime.raw - $almanac.previous_new_moon.raw)/86400,0))

$moonAge is the time since the previous new Moon in seconds, $moonDays is the whole number of days since new Moon. Dividing by 86400 may not be daylight saving safe but it is old code and good enough for my use, YMMV :)

Gary

P C

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Mar 30, 2021, 10:14:34 AM3/30/21

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Merci,

#set $moonDays = int(round(($current.dateTime.raw - $almanac.previous_new_moon.raw)/86400,0))

est parfait !

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