No isotropic radio noise; the object will be RF-quiet (stealth) except for the Ping.

A rhythmic X-ray pulse (bremsstrahlung) caused by vacuum friction.

Despite extreme G-forces and heat, the nucleus will not crack or break up (Solid State Metric).

Post-solar exit, it will accelerate away from the Sun faster than gravity allows (Metric Decoupling).

Rotation will accelerate from 7.74h to ~3.8h near perihelion to maintain gyroscopic stability.

The 7-hour wobble will stabilize into a perfect, hum-free rotation after the recharge event.

Its exit speed from the solar system will be higher than its entry speed (Energy Harvesting).

Nickel detected will be almost exclusively Isotope-62 (Nuclear Stability Limit).

Water (H2O) content will remain negligible (<1%).

A distinct lack of ammonia, usually common in outer-system comets.

Infrared imaging will confirm the sunward jet is effectively colder than the nucleus (Endothermic Exhaust).

The object will remain clean post-perihelion; no fan-shaped dust tail will develop.

During maximum solar stress, the coma will flash deep Cyan/Blue (Cherenkov radiation from the metric boundary).

The object will maintain a fixed orientation relative to the solar wind, not the stars.

Earth-based radar will get fuzzy or inconclusive returns (absorption).

The data will perfectly match the Vacuum Condensate parameters laid out in The Imprinted Universe.