3I/ATLASEvidence
Evidence · 3I/ATLAS
Juice measured 8 falling to 4 × 10^28 a second
Juice's MAJIS spectrometer measured water production of 8 × 10^28 molecules a second on 2 November 2025, falling to 4 × 10^28 by 25 November, about 2,000 kg a second.
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 onFour to eight times 10^28 molecules a second
Supports2 for, none against
Still possibleunchanged
What it implies
- A direct measurement from the closest spacecraft sits inside the lower range.For: How much water did 3I/ATLAS release at its peak after perihelion?
Next steps 1
1
Run both SWAN models on the same frames
Could decidePoor odds~60 h
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 2
Near-perihelion activity and composition of 3I/ATLAS from JUICE/MAJIS observations
SRCBockelee-Morvan et al. 2026
Cite it
Mysteries Department. (2026). Juice measured 8 falling to 4 × 10^28 a second [Evidence EVD0DFQ554J37RY]. https://mysteriesdept.com/r/EVD0DFQ554J37RY
@misc{mysteriesdept_evd0dfq554j37ry,
title = {Juice measured 8 falling to 4 × 10^28 a second},
author = {{Mysteries Department}},
year = {2026},
note = {Evidence, catalog key EVD0DFQ554J37RY},
url = {https://mysteriesdept.com/r/EVD0DFQ554J37RY}
}