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Geocentric Aspect Ephemeris Study

A geocentric aspect ephemeris study tracks the angular relationships (aspects) between pairs of celestial bodies as seen from the center of the Earth, 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:

A completed geocentric aspect ephemeris study with its ephemeris table populated with aspect records for one inner body.

Building a Geocentric Aspect Ephemeris​

To build and generate a geocentric aspect ephemeris:

  1. Create the study from Ephemerides → Geocentric Aspect Ephemeris, or its toolbar button.
  2. Set the study's ephemeris settings, including the required location, and the date range and interval.
  3. On the Inner & Outer Bodies tab, choose the inner and outer bodies.
  4. On the Body & Aspect Metrics tab, choose the body and aspect metrics.
  5. Click the Run button to generate the ephemeris.

The results appear in the ephemeris table, one row per interval step.

A configured geocentric aspect ephemeris study before generation, showing the ephemeris settings.