The Phobos 2 Probe

Phobos 2 reached Mars orbit early in 1989 and began work near the larger of the planet's two moons. On 27 March the mission ended when contact was lost. According to the accounts the archive holds, the spacecraft's images showed a grid pattern, an elliptical shadow moving across the Martian surface, and an elongated object described in one telling as twenty to twenty-five kilometres long and in another as roughly fifteen miles. The probe lost attitude control, began to spin, and stopped transmitting.

What is on the record

Two independent tellings carry this case through two separate channels, and they agree on the shape of the story while differing on its measurements. They diverge on the official explanation and on what is claimed against it: one records that meteorite and dust-collision theories were set aside, the other that Soviet officials blamed a computer malfunction while researchers and claimed United States intelligence sources argued an object had intercepted the craft.

Two things sit outside the archive's own holdings and belong here. The Soviet finding was a computer failure, and that remains the explanation of record. And the shadow frames, which are genuine mission imagery from the probe's thermal instrument, are widely read as the moon Phobos casting its own shadow on Mars, which is what a moon does. The elongated-object image rests on the account of a Soviet test pilot who said it was passed to her, and the archive has not traced it to a frame in the mission's published data.

A further caveat shapes how much weight this file can carry. The four resolved claimants, listed in the archive as Alexander Dunyev, James Harder, Lev Mukhin and Marina Popovich, are commentators on the mission rather than witnesses to an event; two of them were Soviet space officials, and the first name is a transcription of Dunayev. Nobody saw anything with their own eyes. What is discussed is spacecraft telemetry and imagery, and the archive holds discussion of that material rather than the material itself.

Why it sits where it does

The archive records Phobos 2 as RESOLVED · IDENTIFIED. The "object" in the frames is Phobos's shadow, and Soviet investigators traced the loss to an onboard computer fault. A resolved case sits off the evidence ladder and carries no L-tier, whatever the count of claimants, and these four discussed the mission rather than witnessed it. The mission is well documented. The anomalous reading of it is not. The story of what was claimed stays here because it is part of the record. Whether the elongated object was ever in a mission frame at all is not resolved here.