# An error or inconsistency in trajectory modelling and navigation software (reference frames, spheres of…

> Most likely: An error or inconsistency in trajectory modelling and navigation software (reference frames, spheres of influence, Earth orientation, tides)…

Source: https://mysteriesdept.com/mysteries/flyby-anomaly/answers/ANS0CWYEA7M1T1J/an-error-or-inconsistency-in-trajectory-modelling-and  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Questions](https://mysteriesdept.com/questions)[Earth flyby anomaly](https://mysteriesdept.com/mysteries/flyby-anomaly)[What produces the velocity changes seen in some Earth flybys?](https://mysteriesdept.com/mysteries/flyby-anomaly/questions/QST0CWYE98C43P6/what-produces-the-velocity-changes-seen-in-some-earth-flybys)Answer

Answer · Earth flyby anomaly

# An error or inconsistency in trajectory modelling and navigation software (reference frames, spheres of…

An error or inconsistency in trajectory modelling and navigation software (reference frames, spheres of influence, Earth orientation, tides) that affected the earlier analyses.

**Most likely** Answers **1** questionPublished0

## Where it stands

**Most likely** Its tests partly supported it: two pieces of evidence for, one against. It needs two reviews to be accepted.

## What it predicts

- Re-processing the early flybys with one modern, consistent model shrinks or removes the anomalies.
- Later flybys processed with newer software show none.

## What would rule it out

- A uniform modern re-analysis of the raw tracking that still finds the anomalies at their published sizes.

## Evidence 2 for · 1 against

[An alternative formula that predicted the Rosetta nulls was taken by its author to support an error in older…](https://mysteriesdept.com/mysteries/flyby-anomaly/evidence/EVD0CWYEAQ80A98/an-alternative-formula-that-predicted-the-rosetta-nulls-was)

Speculative

FOR

[The later Rosetta flybys and Juno, processed with newer software, show no anomaly.](https://mysteriesdept.com/mysteries/flyby-anomaly/evidence/EVD0CWYEAFE66EG/the-later-rosetta-flybys-and-juno-processed-with-newer)

Supported

FOR

[Different teams with different software (JPL, ESA) found anomalies in different spacecraft.](https://mysteriesdept.com/mysteries/flyby-anomaly/evidence/EVD0CWYEAZ25DCE/different-teams-with-different-software-jpl-esa-found)

Supported

AGAINST

## The questions it answers

[What produces the velocity changes seen in some Earth flybys?](https://mysteriesdept.com/mysteries/flyby-anomaly/questions/QST0CWYE98C43P6/what-produces-the-velocity-changes-seen-in-some-earth-flybys)

Most likelyAn error or inconsistency in trajectory modelling and navigation software (reference frames, spheres of…

## Cite it

```
Mysteries Department. (2026). An error or inconsistency in trajectory modelling and navigation software (reference frames, spheres of… [Answer ANS0CWYEA7M1T1J]. https://mysteriesdept.com/r/ANS0CWYEA7M1T1J
```

Key

**ANS** 0CWYEA7M1T1J

Kind

Answer · hypothesis

Origin

Published

Version

1

Added by

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