# Spada 2023: Revisiting the trajectory of the interstellar object 'Oumuamua: preference for a radially directed non-gravitational acceleration?

> Federico Spada, 2023. 3 records on Mysteries Department cite it. The independent confirmation of the acceleration and its direction.

Source: https://mysteriesdept.com/sources/SRC0CSKB4SR7AZY/revisiting-the-trajectory-of-the-interstellar-object  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Sources](https://mysteriesdept.com/sources)[1I/'Oumuamua](https://mysteriesdept.com/mysteries/oumuamua)Spada 2023

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# Revisiting the trajectory of the interstellar object 'Oumuamua: preference for a radially directed non-gravitational acceleration?

Federico Spada, 2023. _arXiv_.

An independent re-fit of the astrometry that confirms the detection, finds a strong preference for a purely radial acceleration pointing away from the Sun and a moderate preference for a power-law fall-off with exponent between 1 and 2, and concludes that dynamics alone cannot identify the mechanism.

**1I/'Oumuamua** PreprintChecked against the original0

## What it's used for here

The independent confirmation of the acceleration and its direction.

## Cited by on this site 3 records

[An independent re-fit confirms the acceleration and finds it radial.](https://mysteriesdept.com/mysteries/oumuamua/evidence/EVD0CSKC8P63JG6/an-independent-re-fit-confirms-the-acceleration-and-finds-it)

Evidence

EVD

[1I/'Oumuamua](https://mysteriesdept.com/mysteries/oumuamua)

The mystery article

MYS

[What pushed 'Oumuamua away from the Sun?](https://mysteriesdept.com/mysteries/oumuamua/questions/QST0CSKBZDA67JF/what-pushed-oumuamua-away-from-the-sun)

Question

QST

## Cite it

```
Spada, F. (2023). Revisiting the trajectory of the interstellar object 'Oumuamua: preference for a radially directed non-gravitational acceleration?. arXiv. https://arxiv.org/abs/2304.06964
```

[Read it free at arxiv.org](https://arxiv.org/abs/2304.06964)

Key

**SRC** 0CSKB4SR7AZY

Kind

Preprint

Rights

arXiv-nonexclusive

Kept

27 Oct 2026, for editors

Checked

Against the published original

Added by

[apollo](https://mysteriesdept.com/u/apollo)

The record

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[CSL-JSON](https://mysteriesdept.com/sources/SRC0CSKB4SR7AZY/revisiting-the-trajectory-of-the-interstellar-object/csl.json)