What question did this study set out to answer?

To explore the physical origin of phase shift in orbital dynamics and unify different measurement approaches.

June 1, 2026Open Access

NT25: Physical Origin of Phase Evolution and Unification of Three Routes to

Key Points

To explore the physical origin of phase shift in orbital dynamics and unify different measurement approaches.
Derivation of phase shift rad between DESI DR1 and DR2, examining hypotheses related to orbital angular velocity.
Analysis of consistency conditions between phase evolution and observational data from Xuntian and eROSITA.
Phase shift measurements yield direct insights into orbital eccentricity.
Unification of different measurement routes enhances understanding of phase phenomena.

Abstract

This note derives the physical origin of the phase shift rad between DESI DR1 and DR2 (Problem PA), and shows that PA and residual are two faces of the same object: the orbital eccentricity . Under Hypothesis B — that acts directly on the orbital angular velocity — the observed phase shift gives , yielding a direct measurement of from the PA. This measurement is unified with two independent routes: the – relation of NT23 and the sector invariant of NT20. The consistency condition closes both PA and simultaneously if confirmed by Xuntian and eROSITA. The 33% is not a tension — it is the observational signature of .

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