Sunspot Cycle Phasing with Conjunctions of Jupiter and Inner Planets.


A presentation by G.E.Pease

The Sunspot cycle which averages 11 years is still a mystery, with no real conclusive science that has been put forward with any certainty on what controls the varying length of the Sunspot cycle.

Previously in my Neptune/Uranus article we discussed the work of Desmoulins who has graphed the “most aligned days” of Jupiter, Earth and Venus which shows a good correlation with the sunspot record. The two sets of data can drift away slightly but have always kept in sync in the last 400 years. Currently The most aligned days is lagging behind the  Sunspot record slightly and going by past occurrences should catch up during SC24 max. Hung as also done some similar research showing the same result as well as Ulric Lyons who presented his case on this blog last year.

Now we have another study by G.E.Pease which backs up this previous work and provides many diagrams and tables to support the Planet Tidal Theory. The presentation is in powerpoint format and can be downloaded HERE

Desmoulins graph

Desmoulins graph: green peaks =JEV most aligned days

Jovian Angular Momentum Graphs.


Several months ago I attempted to find some sort of data or graph on the angular momentum (AM) of the Jovian planets. After an exhaustive search it seemed as though nothing would be forthcoming. While there have been attempts to graph the Jovians using the solar system barycenter (SSB) as the orbit axis point, my research has suggested all the solar system planets orbit the Sun. Using the SSB as an axis point might be useful for some analysis, but it still remains an inaccurate method of calculating a planets AM if the orbit axis point is the Sun. The orbit axis point of the Jovians is still a contentious issue, but I believe the results of this project will add further evidence that indeed the Sun is king.

Using JPL Horizons I can retrieve the necessary XYZ coordinates and velocities and plug them into Gerry’s angular momentum formula. Many thanks go to Gerry, this project would not have been possible without him.

It must be noted that the JPL data for each planet uses the Sun centre for calculating distance. Technically this is still not correct and the Sun/Planet barycenter would be more accurate but at this stage I am not aware of this data being in existence.

Jupiter Angular Momentum Graph.

jupiter angular momentum graph

Very evident is the influence of Saturn along with the timing of the Jupiter perihelion (closest orbit point) and aphelion (furthest). The blue line is a moving average with the background grey areas being the actual data taken every 5 days. Because the centre of Sun was used as the axis point the actual data is a little choppy (theory). Although the modulation of the planet AM is obvious, very little of this change would be felt at the Sun. For further data on the Jupiter axis point and orbit perturbations see my previous article here:


Although over a shorter period the Planet AM graphs using the SSB as axis point showing a clear difference…

Neptune Angular Momentum Graph.

neptune angular momentum graph

The Neptune angular momentum graph is quite different, being on the outskirts of the solar system the data is less choppy and the clear influence of Jupiter every 13 years approx is quite staggering. The majority of Neptune’s orbit perturbations are in line with Jupiter, only the modulation of the peaks and troughs is influenced by the remaining Jovians.

Notice the very clear difference between the 2 axis points. Source

The SSB derived Neptune graph is clearly a product of the sun moving away from the SSB and dragging Neptune with it, this gives a false reading in the Neptune distance measurement which can also be seen on the Jupiter SSB graph at 1970. I believe the latest Jovian AM graphs prove the existence of the Jovian orbit axis point and also show the correct planet AM data (as near as possible to date). Another outcome of this research will be to nail down exactly what proportion each planet contributes to the overall AM at the Sun. The project is still incomplete but the Jupiter proportion looks to be about 60%. Saturn and Uranus graphs to follow.

UPDATE: P.A.Semi has a paper at

where he produces graphs of all planets calculating planet AM using both axis points. His data is in complete agreement with mine (using Gerry’s formula) and he also shows long term views of the SSB axis graphs.


This long term view of Neptune is particularly interesting, its shows the 172 year down spike each time Uranus is in conjunction, which moves Neptune closest to the SSB and also shows a background trend. The elephant in the room though is that all SSB graphs show a modulation of planet/SSB distance, where as the Sun centered graphs show the planetary perturbations. The failure of the SSB centered graphs to show the all important planetary perturbations suggests to me that all our solar system planets have the Sun as their axis point.

Gerry and I are currently working on a project looking for the missing AM that could finally give a solid link to the Spin-Orbit Coupling debate. Our initial results are very encouraging but we need to double check the data…stay tuned.

Earth's Future Climate.

Click on pic for larger view

Reader Ron De Haan suggested a graph showing future Angular Momentum Disturbance Strength might be of interest. We only have JPL data out to 3000AD so this is the current limit, but the outcome is indeed very interesting. If the Solar activity follows the Angular Momentum trend we are headed for another Medieval Warming Period type era on even a grander scale.

After the Landscheidt Minimum which will be short and sweet, there looks to be another Dalton type event which is not considered all that strong. After that the planet will stay on a warm plateau for hundreds of years, lets hope we have learned by then that the warming we will enjoy is a natural state. The graph shows us how unusual the preceding strong Grand Minima are in our history, which was ruled by strong Type “A” disturbances or as Gerry calls them “Retrograde Bumps”. From here on the AM strength is moving to weak and gradually the disturbances are moving back to Type “B” which are known for periods of reasonable solar stability. So there is no need for pessimism, our children will have it good.

The JPL data used to create the AM graphs as per Carl’s Graph has a range from -3000 to 3000, but I am working on another quantifying method using purely the Jovian planet angles which should allow us to check against the complete Holocene record as well as looking out as far as necessary. Thanks to Tayla Sharp for helping with the graph.