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Skyscript Astrology Forum

Regiomontanus and Morinus program Question
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robhywolf



Joined: 08 Jan 2012
Posts: 44
Location: Lucca, Italy

Posted: Mon Apr 19, 2021 11:08 am    Post subject: Reply with quote

Try again, copying the link completely:

https://1drv.ms/u/s!An6WRGt8Lu0BlDpbcPEpvL9Opj41?e=sRG3K0
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gothic5



Joined: 09 Jun 2014
Posts: 32

Posted: Mon Apr 19, 2021 9:12 pm    Post subject: To Roberto Reply with quote

Roberto-Tried again after copying https://1drv.ms/u/s!An6WRGt8Lu0BlDpbcPEpvL9Opj41?e=sRG3K0 and pasting in 1drive.Still nothing happens.I never used 1Drive before.I will ask for advice on my end of cyberspace if I can't access.Thanks for all your help-Harold
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gothic5



Joined: 09 Jun 2014
Posts: 32

Posted: Mon Apr 19, 2021 9:15 pm    Post subject: To Roberto Reply with quote

Roberto-Now I went to the online site(1drv.ms)-Do I need to create an account to access your link? Harold
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gothic5



Joined: 09 Jun 2014
Posts: 32

Posted: Fri Apr 23, 2021 5:34 am    Post subject: Reply with quote

Roberto-I am glad that you explained formula for ZD.I have worked with Morinus book 22 which has all the formulas for the regio positions in the Morinus program except ZD.I found this link which shows some interesting charts.http://astrozet.net/en/Manual/primary_directions.html -I also was able to find the Makransky books.Regards-Harold
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robhywolf



Joined: 08 Jan 2012
Posts: 44
Location: Lucca, Italy

Posted: Tue Apr 27, 2021 12:49 pm    Post subject: Reply with quote

Hi Harold,

I apologize for my absence, but the Skyscript forum has some imperfections...

In addition to changing the content of the texts if some mathematical notation is used, most of the time I do not receive notifications of reply messages on the threads I participate in. So I had not noticed your subsequent interventions

It's very strange that you were unable to download Makransky's PDFs from my OneDrive. When I have provided some links in the past, there have generally been no problems. At least using Chrome and Edge or another browser and not your OneDrive. By the way: is there anyone who followed the thread and tried to download them?

However, if you have found them, that's fine :-)

Roberto
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robhywolf



Joined: 08 Jan 2012
Posts: 44
Location: Lucca, Italy

Posted: Tue Apr 27, 2021 1:12 pm    Post subject: Reply with quote

Hi Harold,

As for the link you reported, as I understood from the example shown, ZET also correctly depicts the three-dimensional representation of the Placidean domification. That is, it is not based on the in mundo path of the Sun and then projecting onto this (somehow) the position of the planets (which would be an approximate representation) but it seems that for each celestial object it uses its true Placidean Mundane Position -PMP-

Other programs that make use of three-dimensional techniques, use instead the same algorithms used for the Campanus and Regiomontanus domifications, which are "projection systems". And the Placidus is not...

Thank you,
Roberto
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robhywolf



Joined: 08 Jan 2012
Posts: 44
Location: Lucca, Italy

Posted: Wed Apr 28, 2021 1:00 pm    Post subject: Reply with quote

I has been too hasty to comment on ZET's three-dimensional graphs when they are used in Placidus house system.

The problem that arises with Placidus derives from the fact that each planet has its own diurnal arc with celestial latitude other than zero (the orbits do not lie on the ecliptic) and that the cusps of the houses are calculated with an exquisitely temporal criterion NOT valid in space of the Celestial Sphere for the other planets.

Wishing to do so, it would be necessary to have many Placidean house systems in space, and precisely one for each planet. And even succeeding to do that with illegible graphics, by doing this, a rigorous angular comparison IN MUNDO in the metric of space would be impossible.

In other words, we have only two possibilities:
-Place the planets where they really are in the celestial sphere graphics, and then the PMP references are approximated
-Place the planets in the graphics of the Celestial Sphere with their PMP positions referred to the Placidean domification of the path of the Sun, but then the Equatorial and Ecliptic planetary coordinates are approximated.

All this can be summarized with a very simple observation: the Placidus house system is a purely temporal system, and not a spatial one. With it, any technique that represents it in a three-dimensional space is meant to be just an approximate representation of reality.

The good news is that, at least up to about 10° celestial latitude, the approximation is good :-)

Roberto
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gothic5



Joined: 09 Jun 2014
Posts: 32

Posted: Mon May 17, 2021 1:57 am    Post subject: To Roberto Reply with quote

Hello Roberto-When I included astrozet link in my last post I thought it was based on a Regio system.(I didnt read text complete)CMP and ZD was really my interest.But now I can use ZET for the PMP as well.I recently calculated ZD for Saturn from Prince Charles chart(makransky page 36-3Cool where the position of S seems to be where Saturn is found.Makransky uses 3 triangles in his formula.I understood how these 3 were drawn since the sides are all common great circles (and resulting angles) Although I am not sure what the house circle is.I didnt know planets had house circles.I know that it moves on its diurnal arc.But this circle seems different.I searched through Makranskys text but I didnt see this circle explained.Thank You once again for your formula -After doing saturn from the nadir I had to take CMP (apv) from 90 to get ZD As positions shows in Morinus. and you explained when above the horizon the 90 degree distance can be plainly seen.I am glad you explained how this point is found-I wish you the best-Harold
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