Midpoint Trees, and Midpoint Table (Uranian)
For all charts (single wheel or bi-wheel): Natal, Transit, Progressed, Solar Arc, Returns, Synastry.
See the book The Combination of Stellar Influence (COSI) – the standard work on midpoints. I use this as my guide. Recent AC addition, Chiron.
Midpoint planets/points permitted; Moon, Sun…Pluto, Asc, MC, North Node. Note that the planetary selection is also restricted by the choices made by the Displayed Planets menu. For example if Pluto is not selected in the Displayed Planets table then Pluto midpoints are not calculated. AC ver 2.72 allows Chiron to be added to midpoint listings.
Show orb and aspect, applying or separating for trees, and table.
Choice of all major hard aspects (0, 90, 180) to midpoints or include 45 and 135 degrees. This is not affected by the Displayed Aspect/Lines choices.
Air Print Midpoint Trees and midpoint aspect table records.
Bi-Wheel aspects:
These are transit, progressed or directed planetary aspects to natal planetary/point midpoints. Including Solar and Lunar Returns.
For example, suppose the secondary progressed Sun to be at 15 degrees Aries. If natal mercury is at 0:24 degrees Aries and natal Mars is at 29:30 degrees Aries a midpoint will be recognised. Sun – Mercury/Mars.
Limitation of Midpoint Trees
Only 9 aspects per tree can be shown. Usually, this is plenty. If necessary, reduce the number of potential aspects by selecting only major hard aspects: 0, 90, 180. This can be found in the Uranian settings.
Screenshots
Main page – midpoints
- Traditional aspect view
2. Midpoint aspects
Midpoint Aspect Data – from Speculum
Please note:
AC includes midpoints in the Aspects Hits View (not for iPhone). Note that Views #5/6 show the resultant Aspect Hits and can be sync’d to the chart.
Aspect Hits – View #5. Not for iPhone
Aspect Hits – View #6. Not for iPhone.
Accessing Midpoints from the Main page – Animated GIF. This GIF shows aspects from Transiting planets to radix/natal midpoints for Al Pacino
Settings for the Main Page midpoints can be found in the menus on the right of the main page:
Midpoints Settings
Accessing Midpoints from full landscape View – Animated GIF. This GIF shows aspects from Transiting planets to radix/natal midpoints for Al Pacino
Notes:
Long-press shows settings for this View (shown in the animation).
Some annotated screenshots

Transiting Planets and ASC:MC to Natal Midpoints. Note the listing now shows single planet/point to planet/point midpoint.
Transiting Neptune to natal Moon/Venus midpoint – show aspect
Midpoint Trees from Main page. Not iPhone.
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