# A planet in a close binary (S-type, eccentric and precessing) or around a binary (P-type), whose transits are…

> Disputed: A planet in a close binary (S-type, eccentric and precessing) or around a binary (P-type), whose transits are irregular.

Source: https://mysteriesdept.com/mysteries/hd-139139-random-transiter/answers/ANS0D79S2T07JV5/a-planet-in-a-close-binary-s-type-eccentric-and-precessing  
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 planet in a close binary (S-type, eccentric and precessing) or around a binary (P-type), whose transits are…

A planet in a close binary (S-type, eccentric and precessing) or around a binary (P-type), whose transits are irregular.

**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

- Radial-velocity variations from the binary.
- A composite spectrum.

## What would rule it out

- Radial velocities constant to about 1 km/s and a single-star spectrum.

## Evidence none for · 2 against

[Radial velocities exclude stellar and brown-dwarf companions to star A on orbits under about 10 days; no…](https://mysteriesdept.com/mysteries/hd-139139-random-transiter/evidence/EVD0D79S39M6XRD/radial-velocities-exclude-stellar-and-brown-dwarf-companions)

Supported

AGAINST

[Simulations of an eccentric S-type planet always left a detectable periodicity.](https://mysteriesdept.com/mysteries/hd-139139-random-transiter/evidence/EVD0D79S31T6VDJ/simulations-of-an-eccentric-s-type-planet-always-left-a)

Supported

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 planet in a close binary (S-type, eccentric and precessing) or around a binary (P-type), whose transits are… [Answer ANS0D79S2T07JV5]. https://mysteriesdept.com/r/ANS0D79S2T07JV5
```

Key

**ANS** 0D79S2T07JV5

Kind

Answer · hypothesis

Origin

Published

Version

1

Added by

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

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