FA-12152 / Astronomical coordinate conventions / Member archive
A negative-zero declination loses its hemisphere · case 02
A negative-zero declination loses its hemisphere.
Case contract
Input sign is + or -, d is nonnegative degrees, m and s are 0..59; return signed arcseconds including when d is zero.
Why this case matters
Astronomical catalog and observation adapters must preserve the declared coordinate convention across software boundaries.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| southern zero degree | 122 | -122 | Failed |
MEMBER ARCHIVE
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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.
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