Heliocentric Aspect Ephemeris Study
A heliocentric aspect ephemeris study tracks the angular relationships (aspects) between pairs of celestial bodies as seen from the center of the Sun, over a date range and at the interval you choose. You configure two sets of bodies, the inner bodies and the outer bodies, and Cygnus reports the aspects between them.
Bodies and metrics are arranged on two tabs:
- Inner & Outer Bodies: the Inner Bodies and Outer Bodies lists.
- Body & Aspect Metrics: the Body Metrics and Aspect Metrics lists.

Building a Heliocentric Aspect Ephemeris
To build and generate a heliocentric aspect ephemeris:
- Create the study from Ephemerides → Heliocentric Aspect Ephemeris, or its toolbar button.
- Set the study's ephemeris settings, including the required location, and the date range and interval.
- On the Inner & Outer Bodies tab, choose the inner and outer bodies.
- On the Body & Aspect Metrics tab, choose the body and aspect metrics.
- Click the Run button to generate the ephemeris.
The results appear in the ephemeris table, one row per interval step.
