FA-12170 / Astronomical coordinate conventions / Member archive

An absent catalog distance becomes a fabricated spatial point · case 05

An absent catalog distance becomes a fabricated spatial point.

Member previewVariant 5 · 3 implementations · 6 checks per implementation

Case contract

Toy catalog projection: direction is a three-number vector; distance None means unknown and returns None; all nonnegative numeric distances including zero produce componentwise products.

Why this case matters

Astronomical catalog and observation adapters must preserve the declared coordinate convention across software boundaries.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
unknown	`[1, 0, 0]`	`null`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.