Professional-Precision Transit Chart Calculation
The transit calculation infrastructure of the Numji Astrology Engine was compared against Swiss Ephemeris references across 500 test cases spanning the 1900–2100 period, generated from diverse dates and geographical locations. A total of 60,486 results were examined, ranging from planetary positions to transit–natal aspects, retrograde motions, and timeline events.
Numji's independent True Lunar Node calculation, generated from NASA/JPL DE440 data, remained within professional acceptance limits in terms of position and retrograde/direct direction across all 486 test moments. The production engine does not require Swiss Ephemeris or external ephemeris files.
Validated transit calculations
The primary result groups forming the astronomical, geometric, and temporal foundation of transit analysis.
TRANSIT PLANETARY POSITIONS
Tropical ecliptic longitudes, daily movement speeds, and retrograde/direct statuses of transit planets were compared with reference values.
TRANSIT–NATAL ASPECTS
Major aspects between transit planets and natal placements, orb values, and entry–exit behaviors regarding the aspect list were checked.
APPLYING AND SEPARATING ASPECTS
IsApplying results, which determine whether aspects are approaching exactness, were tested alongside the instantaneous speeds of the planets.
TRANSIT TIMELINE
Retrograde starts and ends, exact aspect times, and the detection of transit events occurring within the period were validated across a wide date range.
True Node precision results
Summary of 486 independent comparisons performed using Swiss Ephemeris's true ephemeris mode.
| Calculation | Test | Average Difference | Maximum Difference | Result |
|---|---|---|---|---|
| True North Lunar Node position | 486 | 0.0001079° | 0.0003845° | 486/486 passed |
| True North Lunar Node retro/direct direction | 486 | — | — | 486/486 passed |
| True Node speed consistency | 486 | — | Full consistency | Passed |
Test methodology
The goal was to ensure that results rely on broad time, location, and calculation diversity rather than a single chart.
SCOPE
- Date range: 1900–2100
- 500 distinct transit cases
- A wide range of geographic locations and house systems
- Total of 60,486 eligible comparisons
REFERENCE
- Swiss Ephemeris 2.10.03
- Swiss ephemeris mode and instantaneous speed data
- 486 independent test moments for True Node
- Validation without using Moshier fallback
INDEPENDENT ENGINE
Swiss Ephemeris was used strictly as a comparison reference. Numji's production calculations are executed within its own astrology engine without depending on the validation tool or Swiss runtime files.
HIGH ACCEPTANCE RATE
Over 99.98% of the results eligible for comparison within the test scope remained within professional acceptance and review limits. All True Node position and motion direction tests resulted in a full pass.
What does this result mean for the astrologer?
Numji's transit feature does not merely display current planets; it delivers transit–natal aspects, retrograde motions, applying and separating aspects, and timeline events through a calculation infrastructure backed by an extensive validation set. This allows astrologers to focus on the holistic interpretation of timing rather than technical computations.