Astronomical and Geographic Convergences in the Minas Gerais–Egypt Geometric Overlay: Documented Correspondences for Independent Inspection

This preprint documents a set of astronomical and geometric correspondences associated with the MG–Egypt rigid area-normalized overlay established in a related study (Ribeiro, 2026a; DOI: 10.5281/zenodo.18604464). The manuscript analyzes: (i) the great-circle angular separation between Deneb (α Cygni) and Acrux (α Crucis), defined a priori based on astronomical morphology (Northern and Southern Cross constellations); (ii) the southern declination boundary of Cygnus (28°) and its angular decomposition; (iii) dimensional ratios related to √3/2; and (iv) constrained combinatorial closure derived from the legal geometric specification of the Minas Gerais state flag. All values are reported as documented correspondences under explicitly limited operations and predefined domains. The study does not claim historical intent, symbolic causality, or astronomical determinism. Formal statistical significance would require an external null model and Monte Carlo evaluation, which are outside the scope of this note. This work is presented as an observational technical note for independent inspection.