# The century fade is a calibration artefact of plate photometry.

> Disputed: The century fade is a calibration artefact of plate photometry.

Source: https://mysteriesdept.com/mysteries/tabbys-star/answers/ANS0D8E7HPY1BFW/the-century-fade-is-a-calibration-artefact-of-plate  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Questions](https://mysteriesdept.com/questions)[Tabby's star (KIC 8462852)](https://mysteriesdept.com/mysteries/tabbys-star)[Did the star fade over the twentieth century?](https://mysteriesdept.com/mysteries/tabbys-star/questions/QST0D8E77702V2V/did-the-star-fade-over-the-twentieth-century)Answer

Answer · Tabby's star (KIC 8462852)

# The century fade is a calibration artefact of plate photometry.

The century fade is a calibration artefact of plate photometry.

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

## Where it stands

**Disputed** Two pieces of evidence for, one against. It needs two reviews to be accepted.

## What it predicts

- Constant stars show trends of similar size in the same data.

## What would rule it out

- DR7 light curves of matched constant stars that are flat to well below 0.16 mag per century.

## Evidence 2 for · 1 against

[DASCH photometry has systematics of up to about 0.2 mag per century for most constant stars, so the trend is…](https://mysteriesdept.com/mysteries/tabbys-star/evidence/EVD0D8E7HYR3BHP/dasch-photometry-has-systematics-of-up-to-about-0-2-mag-per)

Suggestive

FOR

[Matched constant stars in DR7 scatter by 0.07 mag/century and share a +0.03 drift](https://mysteriesdept.com/mysteries/tabbys-star/evidence/EVD0DDYF91D8RN9/matched-constant-stars-in-dr7-scatter-by-0-07-mag-century)

Supported

FOR

[Matched stars do not share the target's post-1969 offset](https://mysteriesdept.com/mysteries/tabbys-star/evidence/EVD0DDYF9DGSEKW/matched-stars-do-not-share-the-targets-post-1969-offset)

Suggestive

AGAINST

## The questions it answers

[Did the star fade over the twentieth century?](https://mysteriesdept.com/mysteries/tabbys-star/questions/QST0D8E77702V2V/did-the-star-fade-over-the-twentieth-century)

Part of [What causes the slow fading of the star?](https://mysteriesdept.com/mysteries/tabbys-star/questions/QST0D8E76Z60339/what-causes-the-slow-fading-of-the-star)

Open4 answers, none ahead

## Cite it

```
Mysteries Department. (2026). The century fade is a calibration artefact of plate photometry. [Answer ANS0D8E7HPY1BFW]. https://mysteriesdept.com/r/ANS0D8E7HPY1BFW
```

Key

**ANS** 0D8E7HPY1BFW

Kind

Answer · hypothesis

Origin

Published

Version

1

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