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Optical barycentric velocity correction omits the redshift cross term · case 04

Optical barycentric velocity correction omits the redshift cross term.

Member previewVariant 4 · 3 implementations · 6 checks per implementation

Case contract

Toy exact optical-velocity correction: positive rational speed constant c, measured m and correction b. Return rational string m+b+m*b/c; inputs avoid the singular denominator in the deliberately wrong relativistic attempt. No barycentric correction is computed here.

Why this case matters

Astronomical coordinate adapters must preserve convention semantics. Primary background: https://docs.astropy.org/en/stable/coordinates/velocities.html

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
both redshift terms	`"12"`	`"64/5"`	Failed

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