Tuesday, January 01, 2013

Perfect Moonrises/Moonsets 2013

New Bern, NC

I blogged several times before about perfect moonrises.  The idea fascinates me.   In short, I define a perfect moonrise as being at the right place at the right time to see the moon rise perfect synchronism with the sun set.

For example. On January 27, 2013 at 05:38 GMT you were sailing in the Pacific Ocean in the neighborhood of Tonga.this is what you would see looking out toward the East and the West.  The key point is that the moon is rising while the sun is setting.  On the other side of the world, 180 degrees away, at the same instant of time, another person would see the moon setting in West as the sun rose in the East.  (By the way, I made these pictures using the free planetarium program called Stellarium.)

Looking East




Looking West


I also once published a year's forecast of when and where to be on the globe to witness a perfect moonrise.  I was about to repeat it for 2013 when I realized that I did it wrong.  I considered only longitude and not latitude.  On January 27, 2013 the sun will not rise in the far North nor set in the far South.  You can see the entire loci of points to view the perfect moonrise at that instant in the picture below.  It ranges from Greenland, to Helsinki, to Madagascar for perfect moonrises and from Hudson Bay to San Diego, CA to Antartica for moonsets.  

View of the globe at the instant of the next full moon.

Anyhow, below you can see the times of 2013 full moons.  You will have to figure out for yourself where to be to view the perfect moonrises.

Year
Month
Day
GMT
Day of Week
2013
Jan
27
5:38
Sun
2013
Feb
25
21:26
Mon
2013
Mar
27
10:27
Wed
2013
Apr
25
21:57
Thu
2013
May
25
6:25
Sat
2013
Jun
23
13:32
Sun
2013
Jul
22
10:15
Mon
2013
Aug
21
3:44
Wed
2013
Sep
19
13:12
Thu
2013
Oct
19
1:37
Sat
2013
Nov
17
16:15
Sun


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