# A disintegrating ultra-short-period planet whose dust tail is only sometimes thick enough to be seen.

> Disputed: A disintegrating ultra-short-period planet whose dust tail is only sometimes thick enough to be seen.

Source: https://mysteriesdept.com/mysteries/hd-139139-random-transiter/answers/ANS0D79S3HE78QH/a-disintegrating-ultra-short-period-planet-whose-dust-tail  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Questions](https://mysteriesdept.com/questions)[HD 139139, the "Random Transiter"](https://mysteriesdept.com/mysteries/hd-139139-random-transiter)[If the dips are real, what causes them?](https://mysteriesdept.com/mysteries/hd-139139-random-transiter/questions/QST0D79S04202NJ/if-the-dips-are-real-what-causes-them)Answer

Answer · HD 139139, the "Random Transiter"

# A disintegrating ultra-short-period planet whose dust tail is only sometimes thick enough to be seen.

A disintegrating ultra-short-period planet whose dust tail is only sometimes thick enough to be seen.

**Disputed** Answers **1** questionPublished0

## Where it stands

**Disputed** None pieces of evidence for, two against. It needs two reviews to be accepted.

## What it predicts

- An underlying period under about 5 hours detectable with more data.
- Asymmetric dip profiles from a trailing tail.

## What would rule it out

- A longer data set with no underlying period, or symmetric dip profiles at high signal-to-noise.

## Evidence none for · 2 against

[Only 7 per cent of more than 400 transits would show; simulations put this near the limit of detectability.](https://mysteriesdept.com/mysteries/hd-139139-random-transiter/evidence/EVD0D79S3S853YH/only-7-per-cent-of-more-than-400-transits-would-show)

Suggestive

AGAINST

[The average dip profile shows none of the asymmetry expected from a dust tail.](https://mysteriesdept.com/mysteries/hd-139139-random-transiter/evidence/EVD0D79S41276X2/the-average-dip-profile-shows-none-of-the-asymmetry-expected)

Suggestive

AGAINST

## The questions it answers

[If the dips are real, what causes them?](https://mysteriesdept.com/mysteries/hd-139139-random-transiter/questions/QST0D79S04202NJ/if-the-dips-are-real-what-causes-them)

Open7 answers, none ahead

## Cite it

```
Mysteries Department. (2026). A disintegrating ultra-short-period planet whose dust tail is only sometimes thick enough to be seen. [Answer ANS0D79S3HE78QH]. https://mysteriesdept.com/r/ANS0D79S3HE78QH
```

Key

**ANS** 0D79S3HE78QH

Kind

Answer · hypothesis

Origin

Published

Version

1

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