For AC ver 2.90

This post looks at the historical chart of Marie Antoinette and compares the various natal and transit relocation charts from Astro-Databank and Solar Fire (MS Windows) with AC.

• Note that Astro-Databank doesn’t seem to support a relocated transit other than for the time and date of the natal chart.
• Astro-Databank uses LMT by default for the calculation of the natal chart.
• Solar Fire opts for LAT by default for the calculation of the natal chart and LMT for the relocated chart.
• AC can use either LMT or LAT

Natal Charts

Astro-Databank (astro.com) LMT

Marie Antoinette natal Astro-Databank Chart LMT

Planetary Positions Natal Marie Antoinette Astro-Databank

AC – LMT

AC Marie Antoinette natal LMT

Solar Fire – LAT

Marie Antoinette natal Solar Fire Chart LAT

AC – LAT

AC Marie Antoinette natal LAT

Transit Relocated – 1755

Solar Fire

Marie Antoinette Astro-Databank Relocated 1755

AC

AC Marie Antoinette relocated 1755

Transit Relocated – 1775, Solar Fire and AC

Solar Fire

Marie Antoinette relocated Solar Fire Chart

AC

AC Marie Antoinette transit relocated

PD = Primary Directions

Bounds = Terms

Many parts of this post were written before AC for iPhone was released. Note that although most AC screenshots are for the iPad they apply to the iPhone and Mac too as they share the same underlying code with some minor teaks.

All images/designs/procedures subject to change without notice.

Here’s an excellent introduction to Primary Directions.

Astrological Predictive Techniques | Primary Directions | 1. Ascensions and Bounds

Whitney Houston’s Chart and Primary Directions through the Bounds/Terms (iPad/Mac – same  results for iPhone) – see Seven Stars Astrology link above.

Whitney Housten Chart and PD directions

This post shows AC’s primary direction calculations in comparison with :

• Valens (Mac)

• Morinus (Windows)

• Astro.com (internet)

• Astro Gold ver 9 (Windows)

Note Valens and Morinus invariably agree in their results as Valens is a slimmed-down version of Morinus.

Antiscia

Example Chart: Winston Churchill: Tropical, Mundane. Antiscia. iPad/Mac – ver 3.35, iPhone ver 1.38

“A” prefixed to promissor = Antiscia

“CA” prefixed to promissor = Contra-Antiscia

Note that all antiscia aspects are conjunctions even when contra-antiscia aspects are shown. Enabling (by a tick) the opposition aspect from the Aspect table has no effect on the displayed antiscia aspects.

PD with Antiscia aspects – Churchill #1

PD with Antiscia and Contra aspects – Churchill #1

PD with Antiscia aspects – Churchill #2

PD with Antiscia and Contra aspects – Churchill #2

For comparison: Morinus – Churchill tropical antiscia aspects Primary Directions mundane example

Morinus Churchill tropical antiscia aspects Primary Directions mundane example

iPhone

PD with Antiscia and Contra aspects – Churchill – iPhone

Settings

Antiscia PD Settings for Results table

Note: Lat and long adjusted to Morinus’ lat and long for Churchill.

Primary Directions through the bounds/terms

Example Chart: Winston Churchill: Sidereal. Placidus cusps, Egyptian Terms/Bounds, Zodiacal.

Terms to Asc.

AC Churchill Sidereal Terms to Asc Primary Directions zodiacal

AC Churchill Sidereal Terms to Asc Primary Directions zodiacal #2

Morinus Churchill Sidereal Terms to Asc Primary Directions zodiacal

Example Chart: King Charles III, aka Prince Charles: Tropical. Placidus cusps

Note that all King Charles III charts have their lat and long adjusted to match the Astro.com chart so that comparisons are geographically valid.

AC Chart

AC King Charles III natal

Solar Fire Chart

Solar Fire King Charles natal

Speculum (natal) comparison (especially for Asc, MC), with lat and longitude as per astro.com, 51°N30’00” 00°W10’00” :

Astrodatabank

Valens speculum

Valens – Speculum King Charles

AstroConnexions Speculum

AC – Speculum King Charles

Primary Direction, Saturn Trine MC, promissor no latitude, calculation results comparison

Valens results

Valens King Charles Primary Direction Saturn Trine MC

AC results

Primary Directions King Charles III

Primary Direction, Saturn Trine MC, with promissor latitude, calculation results comparison

AC results

Primary Directions King Charles III – Promissor

Valens results

Valens Saturn trine MC King Charles with Lat Naibod key

Latest AC PD view

Latest AC PD

Promissor’s directed to the ASC. No latitude. Added 39 secs to birth date

AC

Aspects to the ASC results

Morinus (MS Windows) comparison:

Morinus King Charles aspects to the ASC no latitude

Moon aspects to King Charles III – direct and converse

AC King Charles PDs Results Moon aspects to ASC

Valens results

Valens King Charles PDs Results Moon aspects to ASC

AC latest PD view

Interplanetary PD aspects – Tropical

Valens PD Mercury aspects to Mars – Einstein

Valens PD Mercury aspects to Mars Einstein

AC Mercury aspects to Mars – Einstein

AC PD Mercury aspects to Mars Einstein

PD Terms/Bounds as Promissors to ASC

Einstein PD terms to Asc – Morinus (Windows) – Direct

AC Einstein PD Terms to Asc – Direct

AC Einstein Terms to Asc

Einstein PD terms to Asc – Morinus (Windows) – Converse

Morinus Einstein tropical Terms to Asc converse

AC Einstein Terms to Asc – Converse

AC Einstein Terms to Asc PD aspects

AC Einstein Terms to Asc PD aspects – more

Sidereal Examples, Sassanian ayanamsha

AC Allen Ginsberg Sidereal PD terms to Asc and Desc

Terms – sidereal Ginsberg

Morinus – Ginsberg Sidereal PD terms to Asc and Desc

Morinus Ginsberg Sidereal Terms to Asc sass

Calculating Terms as Promissors – tropical. for King Charts III.

If the terms are not shown in the chart:

Show terms in the chart

Show terms

Terms wheel choice

Results:

Terms to Asc results

Sidereal Interplanetary Aspects, Sassanian ayanamsha

King Charles III, Jupiter aspecting Moon

AC King Charles III planet to planet Jupiter Moon Sidereal

Morinus results

Morinus King Charles III planet to planet Jupiter Moon Sidereal

Primary Directions. Placidus semi-arc zodiacal, fixed stars as promissors

From AC ver 3.29, AC for iPhone ver 1.34

Comparison with Morinus

Primary Directions Mundane Promissor and Significator for South Node.

Solar Fire Mercury Churchill to true node, asc, mc Primary Directions Mundane Direct

AC Mercury Churchill to true node, asc, mc Primary Directions Mundane Direct

Comparison: Solar Fire Gold ver 9.029 vs AC Mundane Direct aspects to Asc

Please note that the following will apply to the iPad as the code is the same, although the UI is different.

Comparison Solar Fire Gold ver 9.029 vs AC Direct mundane aspects to asc

Comparison Solar Fire Gold ver 9.029 vs Morinus vs AC Direct Mars Sun Mundane aspects to the Sun

Comparison Solar Fire Gold ver 9.029 vs Morinus vs AC Direct Mars Sun mundane aspects to the asc

Rectification – Comparison – Morinus vs AC, Mundane.

Note: if changing from Zodiacal aspects to Mundane aspects or vice versa when using rectification you must start again by changing the chart from Transit to Natal. This only applies to the rectification result.

iPhone model: XR

Al Pacino chart

Morinus rectif mundane moon sq mercury

AC rectif mundane moon sq mercury

Rectification by 5 minutes

Morinus rectif mundane moon sq mercury plus 5 mins

AC rectif mundane moon sq mercury plus 5 mins

Adding 10 seconds

Morinus rectif mundane moon sq mercury plus 10 secs

AC rectif mundane moon sq mercury plus 10 secs

Horary Aspect table settings

Show only applying major aspects with traditional planets in the Aspect Table (bottom left) – a preferred traditional astrology setting.

Traditional Planetary Orbs (moiety)

Planetary Hours

Day and hour Lords

Antiscia charts and aspects

Essential Dignities and Debilities table

Terms: Ptolemy, Egyptian Chaldean

Triplicity: Dorotheus, Lilly

Planetary Sect, Almutens

Terms and Triplicities shown around proportional chart wheel

Traditional chart wheel

Nudge Chart in real-time to see when any or next aspect perfects

Traditional Chart overview

Traditional overview

iPhone

iPhone XR Trad aspect grid

Historical Charts

In appreciation of the book Annual Predictive Techniques by Martin Gansten. Showing how to use AC with the chart examples given. With comments and observations.

Please see AC Blog post:

Please also see:

Mundane Primary Directions

Some comparisons/instructions/notes – using Primary Directions

The Primary Directions view is not available for iPad mini, or 9.7″ iPads in portrait orientation if using iPadOS 26+. It is available in landscape orientation.

Primary Directions Promissor and Significator fix for South Node.

Solar Fire Mercury Churchill to true node, asc, mc Primary Directions Mundane Direct

AC Mercury Churchill to true node, asc, mc Primary Directions Mundane Direct

Added Sorting control for Primary Directions print view.

Print added a Sort control

Added chart snapshot view for Primary Directions (iPad/Mac – ver 3.26, not iPhone)

Snapshot of natal Chart for Primary Directions Module

• Radix/natal only. Your Charts and Provided Charts

• Aspects of Promissors to Significators

• Keys: Naibod, Ptolemy, Cardan

• Type: Mundane, Placidus semi-arc

• Direct And Converse

• Tropical and Sidereal

Ensure that all promissors and significators (that are required by the Primary Direction module) are shown on the currently displayed natal chart.

This is essential for all calculated points such as POF, POS, all other Arabian parts, Vertex. Not required for the Nodes.

Terms/fixed stars as promissors not applicable for Mundane.

Placidian mundane POF is not currently calculated.

Skyscript – informed discussion – Primary Directions

Examples

See article – “IN MUNDO” DIRECTIONS

Lucrezia Borgia – Heaven Astrolabe

See AstroDatabank for the natal chart

Lucrezia Borgia

Borgia astrodatabank

AC Borgia chart

Enter the Julian date and select LMT to get the correct AC  chart

Borgia AC

AC Settings

Borgia Settings

AC Mundane Primary Directions

Borgia PD iPad

Note date is Julian in AC chart. Equivalent Gregorian date is 25/06/1507

iPhone 15

Borgia Natal Chart-  iPhone

Mundane Results Borgia iPhone

Comparison Solar Fire Gold ver 9.029 vs AC Direct mundane aspects to Asc

Please note that the following will apply to the iPad as the code is the same, although the UI is different.

Comparison Solar Fire Gold ver 9.029 vs AC Direct mundane aspects to asc

Comparison Solar Fire Gold ver 9.029 vs Morinus vs AC Direct Mars Sun mundane aspects to the Sun

Comparison Solar Fire Gold ver 9.029 vs Morinus vs AC Direct Mars Sun mundane aspects to the asc

Rectification – Comparison – Morinus vs AC

Note: if changing from Zodiacal aspects to Mundane aspects or vice versa when using rectification you must start again by changing the chart from Transit to Natal. This only applies to the rectification results.

iPhone model: XR

Al Pacino chart

Morinus rectif mundane moon sq mercury

AC rectif mundane moon sq mercury

Rectification by 5 minutes

Morinus rectif mundane moon sq mercury plus 5 mins

AC rectif mundane moon sq mercury plus 5 mins

Adding 10 seconds

Morinus rectif mundane moon sq mercury plus 10 secs

AC rectif mundane moon sq mercury plus 10 secs

Primary Directions Module (Tropical and Sidereal) – Zodiacal, Placidus semi-arc

• Radix/natal only. Your Charts and Provided Charts

• Keys: Naibod, Ptolemy, Cardan

• Type: Zodiacal, Placidus semi-arc

• Aspects of Promissors to Significators

• Direct And Converse

• Terms (bounds) to Asc

• Latitude: None, Promissor, Significator, Both

• Bianchini latitudes

• Fixed Stars.

Ensure that all promissors and significators (that are required by the Primary Direction module) are shown on the currently displayed chart.

This is essential for all calculated points such as POF, POS, all other Arabian parts, Vertex. Not required for the Nodes.

Inspiration and calculation comparison:

Primary Directions book – Martin Gansten

Astrological Prediction book – Oner Doser

Valens astrology app (Mac)

Morinus astrology program (MS Windows)

Solar Fire Gold ver 9, astrology program (MS Windows)

Bob Makransky Primary Directions book – essential

AC Primary Directions Menu

Please note that PD rectification will not work correctly with a Transit Relocated chart

Primary Directions Menu

AC Primary Directions Example – most recent view shown – from AC ver 3.23, AC for the iPhone ver 1.30

Differs from previous AC versions/view with the addition of Bianchini, and Mundane aspects.

Borgia PD iPad

iPhone

Rectification via Primary Directions for iPhone

Note: if changing from Zodiacal aspects to Mundane aspects or vice versa when using rectification you must start again by changing the chart from Transit to Natal. This only applies to the rectification results.

Rectification for PD

Primary Directions for the iPhone

Differs from previous view with the addition of Bianchini, and Mundane aspects.

Mundane Results Bogia iPhone

Primary Directions – tap icon bottom right. From AC ver 1.10 Drop Down menu option removed.

PD icon

PD icon – Display Zoom set to Larger Text

PD icon – Display Zoom set to Larger Text

Primary Directions Example annotated – iPad/Mac (similar for iPhone)

Printing

Primary Directions Print Preview

PD Print Option

Bianchini latitudes method – iPhone (similar for iPad)

Checked with Valens (Mac python app)

Valens Einstein Natal

Valens PD Bianchini settings

Bianchini results Valens

AC Bianchini

AC Einstein natal

AC Bianchini

iPad Bianchini

Bianchini Einstein Natal

Here’s a link to many AC Primary Directions examples

Notes and Caveats

Promissor: applying planet/point

iPhone: Prom.

Significator: stationary planet/point

iPhone: Signif.

Terms: if Terms is selected (ie ticked) as a promissor – see above, no other promissor is allowed. Also Asc and IC should be the only Significators selected. Conjunction is the aspect that should be selected. See below for video. Egyptian Terms used in all examples.

Solar Charts, Draconic Charts

Not advisable for Primary Directions

Heliocentric charts

Not available for Primary Directions

Printing

if the results are sorted Print Preview (icon bottom right) shows the sorted results.

The last Primary Directions operation (provided the Calculation button is tapped) is automatically saved to the AC database so that on returning to use Primary Directions again the last operation is reloaded.

Calculating the Primary Directions – the Calculate/Calculated button

Note that the tick in the Calculate button only appears after the primary directions have been calculated and displayed ie the button has been tapped. The Calculate button text changes to Calculated and a tick appears. Tapping on the Key or Lat choices or Promissor or Significator or Aspects or D/C table records removes the Calculated button tick and changes the Calculated button text to Calculate.

Basically, changes to anything that might alter/affect the calculated results removes the Calculated tick and changes the text to Calculate. Tap the button again to re-calculate your choices. Please see video below.

Direct and Converse PD aspects

AC King Charles To show PD aspects Direct and Converse

Results illustrating the above chart

King Charles III Aspects

Rectification – module addedAC ver 2.91. Coming soon for the iPhone.

Please note that PD rectification will not work correctly with a Transit Relocated chart.

Rectification

Rectification for Primary Directions

Starting the process

Rectification annotated

Rectification enabled

Rectificatio started

Note that time changes using the rectification module does not remove the Calculated tick.

Primary Directions and Terms (Bounds)

Note that currently to use PD for Terms the settings are:

Desc may also be selected.

Terms for PD – direct results only shown – an option being tested.

Note that no other Promissors can be selected. This will be removed in the next AC version, 3.39 so that Directions and Terms can be shown

Next AC version, 3.89

Added: Terms | Directions | Terms + Directions for the Results table

PD Terms Setiings

Importing historical charts – New Style versus Old Style

You may need to change to Old Style after an historical chart has been imported. Go to Edit Chart to do this after import.

For instance the chart of Nostradamus after import is set to LMT and NS when it should be set to OS (Old Style), not NS.

Rule of thumb, before 1752 = Old Style (OS). DOB of Nostradamus is 14th dec 1503.

Here’s a comparison of charts to show that AC can handle historical chart accurately.

LMT and LAT

Nostradamus AC

Here’s the same chart from astro.com

Nostradamus astro.com

Casting the chart by selecting New Chart and entering the details by hand.

AC correctly determines the correct settings:

Nostradamus

Edward VI

See Skyscript website – subscription to Patreon required. In-depth review of Cardan’s analysis of Edward VI chart by Deborah Houlding. Heres the equivalent AC chart.

Edward VI

AC = AstroConnexions. SA = Solar Arc, RA = Right Ascension, Long = Longitude, MC = Midheaven, Asc = Ascendant. PD = Primary Directions (Placidian semi-arcs).

Solar Fire, Windows astrology software. Astro Gold, iOS astrology software, Morinus.

Secondary Progressions

RA or Long – Naibod

Tropical and sidereal are calculated by AC in the same way Solar Fire, Astro Gold iOS, and astro.com calculate these progressions. Note that astro.com does not calculate sec. prog. in long.

In Solar Fire the option for sec. prog. in RA is “Chart Angle Progression: Naibod in RA”.

MC by Solar arc – this is similar to the setting in astro,com (which is used with sec prog. in RA by AC and astro.com):

MC from Solar Arc.- cropped screenshot from astro.com’s website.

Solar Arc directions

Long 

AC calculates the difference between the natal Sun in long and the progressed Sun in long which gives the Solar Arc. This arc is added to the ramc of the natal MC to give the progressed MC in RA. Then the ecliptic longitude of the progressed MC and corresponding Asc is derived.

astro,com gets the same results as AC. Astro gold iOS calculates the Asc differently. It adds the SA arc to the natal Asc. This gives a different Asc directed degree from AC and astro.com

The SA arc is added to the natal planetary positions to get the SA progressed planetary positions. Parts, eg Part of fortune are calculated from the new progressed positions.

Solar Arc declinations

are calculated in a similar manner to astro.com and not like Solar Fire.

All other solar arc calculations/results in longitude are the same for astro.com and Solar Fire:

Directed planetary/points, House Cusps.

RA

AC calculates the difference between the natal Sun in RA and the progressed Sun in RA – Solar Arc. This arc is added to the ramc of the natal MC to give the progressed MC in RA. Then the ecliptic longitude of the progressed MC and corresponding Asc is derived.

Astro.com does not include SA by RA. Note that Astro Gold iOS calculates the Asc and MC differently than AC.

AC adds the Solar Arc in RA to the natal planetary positions to get the SA progressed planetary positions for AC. Astro Gold iOS/Solar Fire does not do this.

Parts, eg Part of fortune, are calculated from the new progressed positions.

Tropical and/or sidereal:

AC recommends using Solar Arc in Long, and Secondary Progressions in RA.

Primary Directions, zodiacal and mundane, direct and converse Placidian semi-arcs. Tropical or Sidereal.

AC has identical results as Morinus (Windows), Valens (Mac). This applies if all parameters are identical, inc  geographic lat and long.

See many articles in the AC knowledge base for Primary Directions.