22 - 04:06 (245 ) 18:37 (112 ) 23:52(35.3 ) 379,702 99.8%
23 - 05:15 (251 )19:08 (105 ) Moon does not pass the meridian on this day.
24 - 06:22 (258 )19:36 (98 ) 00:41 (40.6 ) 384,078 98.3%
25 - 07:25 (266 )20:01 (91 ) 01:26(46.3 ) 388,724 94.5%
Taken from www.timeanddate.com/moon/japan/sendai
I want to go out for a night sail tomorrow and watch the full moon rise. (in Japan). (at 18:37 )
here is and explanation of the numbers above (the degree "little circle" didn't paste in my copying So degrees are in brackets)
1/ 22 date August 22nd.
2/ 04:06 (245 ) Moon set time and direction.
3/ 18:37 (112 ) Moon rise time and direction
4/ 23:52 (35.3 ) Meridian passing time and location. I am guessing that this is time and angle of the highest altitude that the moon reaches
5/ 379,702 The distance to the moon in Kilometers
6/ 99.8% Illumination.
My question is about Saturday the 23rd.. What does " Moon does not pass the meridian on this day." mean?
gary
See here 3/4 way down the page under FAQ: General Info and Instructions. Click on the link - the moon's cycle is a bit more than 24hrs so there can be a 24hr stretch when it won't pass the meridian.
www.timeanddate.com/moon/help#:~:text=Since%20the%20Moon%20moves%20in,meridian%20passing%20to%20the%20next.&text=In%20that%20case%2C%20it%20does,this%20day%20for%20that%20day.
Thanks r13.
The answer was there on the page's Q&A.
Still a little difficult for me to understand but I will just say , I've got it.
gary
Gary, as you will have notice from tide tables also, the moon's apparent cycle is 24 hrs 50 minutes.
The 'meridian' is from Latin, meaning middle of the day, when the sun/moon/star is the highest in the sky on its (apparent) journey from east (rising) to setting (west). The theory of it is in celestial navigation. They rise in the east, doing an arc across the sky and set in the west. The highest point of that arc (because we are on a globe) is its altitude, and the meridian is the line from the horizon to due south (you)/north (us).
The moon orbits the Earth to the east, and the Earth orbits the sun to the east also. Somehow that ties in with the moon having to do more than 360 degrees around us, but an additional bit also, because the Earth has gone 1/365 around its orbit.
That's all I understand.
So at 24hrs 50 minutes, there will be an occasional 24hour period (our standard day) in which there is no meridian transit. In your reference this is the 24hrs 50 from 11.52pm on the 22nd, to 12.41am on the 24th.
