Supermoons

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Supermoons

Karl Palmen

Dear Calendar People

 

I’ve decided to check my full moon cycle calendar at

http://the-light.com/cal/kp_fumocy_q.txt against the current supermoon and find the supermoon is 5 days later than the start of a full moon cycle according to the calendar.

I found that the Wikipedia Supermoon page links

https://www.fourmilab.ch/earthview/pacalc.html which calculates lunar perigee times, moon distance and the time to the nearest full moon or new moon in days and hours.

 

From this I found that this supermoon had the full moon 2 hours past the perigee and others in recent years were nearer to perigee.

This supermoon was the last of seven full moons with 3 hours of perigee occurring once every 14 lunar months.

 

Perigee Date  Full moon diff   Date of New full moon cycle in calendar

2010-01-30    +2 hours         2010-02-04  (5 days late)

2011-03-19    +0 hour          2011-03-22  (3 days late)

2012-05-06    -0 hour          2012-05-07  (1 day late)

2013-06-23    -0 hour          2013-06-23  (same day)

2014-08-10    -0 hour          2014-08-09  (1 day early)

2015-09-28    -1 hour          2015-09-24  (4 days early)

2016-11-14    -2 hours         2016-11-09  (5 days early)

 

This table shows that my Full Moon Cycle (Fumocy) calendar is well aligned.

 

The bigger supermoon 68 years ago was 4 hours different from perigee. The changes in eccentricity of the moon’s orbit cause to biggest supermoons not to normally be the full moon nearest to perigee.

 

Karl

 

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