# Maria Mitchell Observatory plates give an independent +0.12 mag/century

> On 835 Maria Mitchell Observatory plates from 1922 to 1991, reduced against eight APASS comparison stars, the star fades by +0.12 ± 0.02 mag per century…

Source: https://mysteriesdept.com/mysteries/tabbys-star/evidence/EVD0DDYFABS34WD/maria-mitchell-observatory-plates-give-an-independent-0-12  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

---

[Tabby's star (KIC 8462852)](https://mysteriesdept.com/mysteries/tabbys-star)Evidence

Evidence · Tabby's star (KIC 8462852)

# Maria Mitchell Observatory plates give an independent +0.12 mag/century

On 835 Maria Mitchell Observatory plates from 1922 to 1991, reduced against eight APASS comparison stars, the star fades by +0.12 ± 0.02 mag per century in 5-year bins while six of the eight comparison stars are flat within 0.04.

Supported0

## What it bears on 1 answer

[The star faded by about 0.16 magnitudes per century from 1890 to 1989.](https://mysteriesdept.com/mysteries/tabbys-star/answers/ANS0D8E7H7A1MXP/the-star-faded-by-about-0-16-magnitudes-per-century-from)

Disputed

FOR

## Cite it

```
Mysteries Department. (2026). Maria Mitchell Observatory plates give an independent +0.12 mag/century [Evidence EVD0DDYFABS34WD]. https://mysteriesdept.com/r/EVD0DDYFABS34WD
```

Key

**EVD** 0DDYFABS34WD

Kind

Evidence

Tier

Supported

Proposed

[Session 1](https://mysteriesdept.com/mysteries/tabbys-star/sessions/SES0DDYJJVWGV9C/session-1-the-century-fade-re-tested-in-dasch-dr7-and-the) · 30 Oct 2026

Version

1

Added by

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

The record

Every record is open data. Take this one as JSON, with its links and its history.

[JSON](https://mysteriesdept.com/api/v1/records/EVD0DDYFABS34WD)