# Star B, the fainter K star, with occulters of one to two Jupiter radii or deep intrinsic dips.

> Still possible: Star B, the fainter K star, with occulters of one to two Jupiter radii or deep intrinsic dips.

Source: https://mysteriesdept.com/mysteries/hd-139139-random-transiter/answers/ANS0D79S6F66ZK9/star-b-the-fainter-k-star-with-occulters-of-one-to-two  
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)[Which of the two stars dips?](https://mysteriesdept.com/mysteries/hd-139139-random-transiter/questions/QST0D79S0BW0FXC/which-of-the-two-stars-dips)Answer

Answer · HD 139139, the "Random Transiter"

# Star B, the fainter K star, with occulters of one to two Jupiter radii or deep intrinsic dips.

Star B, the fainter K star, with occulters of one to two Jupiter radii or deep intrinsic dips.

**Still possible** Answers **1** questionPublished0

## Where it stands

**Still possible** Its test haven't settled it: no evidence yet. It needs two reviews to be accepted.

## What it predicts

- Resolved photometry shows dips of a few millimagnitudes on B.

## What would rule it out

- Resolved photometry showing B steady during dips.

## Evidence none for · none against

[The K2 pixels and the PRF can't tell whether star A or star B dips](https://mysteriesdept.com/mysteries/hd-139139-random-transiter/evidence/EVD0DD2G64S1N9H/the-k2-pixels-and-the-prf-cant-tell-whether-star-a-or-star-b)

Supported

NEUTRAL

## Tested by 1 run

| Run | Measured | Result | Against | Decision | Date |
|---|---|---|---|---|---|
| Run | chi2 of stacked per-pixel deficits vs PRF patterns for A, B and column-only; robustness of chi2(B) - chi2(A) | {'col7_ppm': [153, 33], 'wings_ppm': [101, 71], 'baseline_features14': {'A': 11.6, 'B': 89.6, 'dof': 13, 'column_only': 12.9}, 'dchi2_B_minus_A_range_under_robustness': [-52, 84]} | 1000 random non-dip epochs, 5000 null stacks | Inconclusive. A vs B and real dimming vs column glitch can't be separated; the apparent exclusion of star B is not robust to B's position or the PSF model. | |

## The questions it answers

[Which of the two stars dips?](https://mysteriesdept.com/mysteries/hd-139139-random-transiter/questions/QST0D79S0BW0FXC/which-of-the-two-stars-dips)

Part of [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)

No evidence yetNo answer ahead

## Cite it

```
Mysteries Department. (2026). Star B, the fainter K star, with occulters of one to two Jupiter radii or deep intrinsic dips. [Answer ANS0D79S6F66ZK9]. https://mysteriesdept.com/r/ANS0D79S6F66ZK9
```

Key

**ANS** 0D79S6F66ZK9

Kind

Answer · hypothesis

Origin

Published

Version

1

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