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Planetary Defense Council
PLANETARY DEFENSE COUNCIL · UNITED NATIONS
Monday, 30 March, Year 4 of the Crisis Era
Preparations under way for the 13th meeting of the Council
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Home›Crisis Intelligence›Fleet Public Observation Data

Fleet Public Observation Data

FLEET DATA · Bulletin No. 7 · Updated March, Year 4 of the Crisis Era

This page presents the public observation data for the Trisolaran Fleet, sourced from public bulletins of the Observation Network. All estimated values include error margins; these margins will be continuously revised as observation methods advance, which is a normal scientific process in itself.

Current data (Bulletin No. 7)

ProjectValueDescription
Current distanceApproximately 4.14 light-yearsError ±0.02 light-years
Formation sizeApproximately 1,000+ shipsBased on intercepted communication archives; observation not updated
Cruising speedApproximately 1% of the speed of light (estimated)Consistent with the propulsion capabilities recorded in the archives
Arrival windowYears 400–430 of the Crisis EraComprehensive assessment: Fleet Position Bulletin No. 7 remains uncorrected
Maneuver statusNo signs of maneuvering observedGlow spectrum and brightness remain stable over the long term

Observation methods

  • Tracking object: Electromagnetic glow of the fleet's propulsion systems. Long-term photometric and spectral monitoring is conducted by large-scale sky survey telescope arrays.
  • Distance measurement: A combination of multi-station parallax and brightness model inversion; error margins are derived from discrepancies among multi-station data.
  • Orbit change identification: If the fleet accelerates, decelerates, or maneuvers, multi-station data will simultaneously show identifiable deviations—this is also the reason why rumors regarding "fleet turning" can be verified.

Why does the data appear to remain "unchanged"?

Statement by the Head of the Administration Center at the time of the release of Fleet Position Bulletin No. 7: "Fleet navigation operates on an annual scale. In a cruising state, one year brings no significant changes—this is precisely the nature of the crisis: it is a war measured in four hundred years, and we must learn to interpret data on a four-hundred-year scale."

Historical bulletins

Document NumberRelease timeKey Points
PDC/OBS/BF-01April, Year 3First public briefing following the establishment of the Observation Network
PDC/OBS/BF-04October, Year 3First estimation of the arrival window for Years 400–430
PDC/OBS/BF-06February, Year 4Distance caliber revised to approximately 4.14 light-years
PDC/OBS/BF-0728 March, Year 4Current caliber; no signs of maneuvering observed
Complete historical briefings (Nos. 1–7) are available in the Document Centre, retrievable by document number PDC/OBS/BF. Next update: 10 April, Year 4 of the Crisis Era.