Evidence · Tabby's star (KIC 8462852)

Sonneberg plates covering 1934-1995 show no step and no fade

Differential photometry of 861 Sonneberg pg plates against 39 colour-matched comparison stars gives a 1934-1995 slope of -0.006 ± 0.032 mag per century with continuous coverage through the Harvard gap, which leaves no room for a 0.1 mag drop between the 1950s and the 1970s.

Supported0

What it bears on 1 answer

A single drop of about 0.1 mag across the 1953-1969 plate gap, not a steady century fade

Still possible

AGAINST

Cite it

Mysteries Department. (2026). Sonneberg plates covering 1934-1995 show no step and no fade [Evidence EVD0DDYF9R189DE]. https://mysteriesdept.com/r/EVD0DDYF9R189DE

@misc{mysteriesdept_evd0ddyf9r189de,
  title     = {Sonneberg plates covering 1934-1995 show no step and no fade},
  author    = {{Mysteries Department}},
  year      = {2026},
  note      = {Evidence, catalog key EVD0DDYF9R189DE},
  url       = {https://mysteriesdept.com/r/EVD0DDYF9R189DE}
}