Evidence · 3I/ATLAS

SWAN standard model: 3.17 × 10^29 on 6 November

Fitting the SOHO/SWAN hydrogen coma with their standard model, Combi and colleagues found 3.17 × 10^29 water molecules a second on 6 November 2025 at 1.40 au.

Supported0

What it means

Key questionWhy did 3I/ATLAS's activity and chemistry change so much across perihelion?

No answer ahead yet

Openunchanged

Part of itHow much water did 3I/ATLAS release at its peak after perihelion?

2 answers, none ahead yet

Openunchanged

Answer this evidence bears onAbout 3 × 10^29 molecules a second

Supports1 for, none against

Still possiblewas No evidence yet

What it implies

The high value comes from a single date and one model.For: How much water did 3I/ATLAS release at its peak after perihelion?

Next steps 1

Run both SWAN models on the same frames

Could decidePoor odds~60 h

On: How much water did 3I/ATLAS release at its peak after perihelion?

2score

Details

Apply the Combi and Tan hydrogen-coma models to the same SOHO/SWAN images for 6 November 2025. Agreement near 4 × 10^28 rules out the high value; agreement near 3 × 10^29 rules out the low one. Needs the SWAN team's processed frames.

Ranked by how likely each is to move the key question, for the time it takes

Sources 1

Water Production of Interstellar Comet 3I/ATLAS from SOHO/SWAN Observations after Perihelion

Combi 2025

SRC

Cite it

Mysteries Department. (2026). SWAN standard model: 3.17 × 10^29 on 6 November [Evidence EVD0DFQ55HTM3KJ]. https://mysteriesdept.com/r/EVD0DFQ55HTM3KJ

@misc{mysteriesdept_evd0dfq55htm3kj,
  title     = {SWAN standard model: 3.17 × 10^29 on 6 November},
  author    = {{Mysteries Department}},
  year      = {2026},
  note      = {Evidence, catalog key EVD0DFQ55HTM3KJ},
  url       = {https://mysteriesdept.com/r/EVD0DFQ55HTM3KJ}
}