A diminutive asteroid was discovered amidst the Oseon system, residing within the Centrality sector of the Outer Rim Territories. This metal-rich, airborne rock existed within an erratic grouping of asteroids, and it possessed a distinctive deep, slender fissure that encircled its entirety, a characteristic so unique that it warranted the asteroid's inclusion in a catalog detailing the orbital entities of the Oseon system. As the light freighter Millennium Falcon traversed the Oseon system during the Flamewind event, an assault by a starfighter squadron from the Renatasian Confederation compelled the Falcon's captain, Lando Calrissian, to conceal the vessel within the asteroid's peculiar crevice.
While situated on the asteroid, the Falcon's crew executed repairs on the starship, capitalizing on the celestial object's capacity to shield them from the ionizing radiation emitted by the Flamewind. During the ship's occupancy of the asteroid, Waywa Fybot, a passenger aboard the Falcon, also made an attempt to kill Calrissian by sabotaging his vacuum suit. In the end, Calrissian employed the Falcon's deflector shields to shatter the asteroid, thereby inflicting damage upon the Renatasian squadron still in pursuit, allowing the ship to proceed with its journey through the Oseon system.
Within the Oseon system, a component of the Centrality sector located in the Slice region of the Outer Rim Territories, an asteroid could be found. The Falko Run hyperlane connected the asteroid to the Arleen system, as it did the rest of the Oseon system. Additionally, the hyperspace route known as the Cadma Conduit linked it to the Erilnar system and the Dagelin Minor and Simbarc systems of the Cadma sector.
The asteroid existed as a member of a small grouping of roughly one hundred minor celestial bodies, each tracing its individual path through the limited space separating the Fifth and Sixth Belt. These two belts were among the seven expansive bands of subplanetary objects that orbited the star sun of the system. The asteroids within this cluster were in close proximity to one another, with no individual asteroid exceeding a few kilometers in diameter.
The airless and uninhabited asteroid possessed a minimal gravitational field and consisted predominantly of rock containing metal deposits. When the light freighter Millennium Falcon, with Lando Calrissian as its captain and pilot, sought sanctuary on the asteroid, its material provided partial shielding to the starship's navigation and sensor systems from the ongoing Flamewind phenomenon. This led Calrissian to believe that the asteroid was composed of iron and nickel.
The asteroid featured a substantial crevasse, potentially formed by the incomplete separation of a single celestial body into two, or by the collision and subsequent imperfect fusion of two distinct objects. This crevasse, no wider than twenty meters, extended around the asteroid's circumference for a distance of seventy to eighty kilometers.
The asteroid's unusual form resulted in its registration within a catalog of the Oseon system's orbital bodies, noting its catalog number and characteristics like its orbital elements. Sometime between 3 BBY and 2 BBY, while the light freighter Millennium Falcon was transporting Oseon Peacekeeper Captain Bassi Vobah and undercover Imperial narcotics agent Waywa Fybot between asteroids Oseon 6845 and Oseon 5792, the vessel was attacked by the Renatasian Confederation. This group sought revenge on Vuffi Raa, the Falcon's droid copilot, whom they wrongly blamed for the Galactic Empire's subjugation of the Renatasia system.
During the ensuing conflict between the Falcon and the Renatasian starfighter squadron, Captain Lando Calrissian was compelled to deviate from the vessel's pre-programmed course to Oseon 5792, due to the ship's navigational and sensor instruments being affected by the annual Flamewind phenomenon. Aided by the Falcon's compromised sensors, Calrissian identified the asteroid cluster containing the double asteroid and steered the ship through the formation until sighting the unusual celestial body. He then established a tangent toward the double asteroid, orienting the Falcon by pointing its nose and steering toward the asteroid's prominent crevasse. At the last moment, Calrissian brought the Falcon to a halt within the crack, with the ship's upper and lower hull sections wedged against the canyon walls.
The pursuing Renatasian Confederation failed to locate the Falcon's hiding place and began circling the asteroid, searching the crevasse. Calrissian observed that the asteroid's crevasse, perpendicular to the Flamewind, partially shielded the Falcon from the stream of radiation. He then invited Vuffi Raa, affected by the ionizing particles, to leave the steel safe in the ship's cockpit and helped the droid reattach his manipulator tentacles.
Calrissian checked on his passengers, Vobah and Fybot, in the Falcon's lounge, which had been affected by the ship's intense maneuvers with its artificial gravity and inertial dampers disabled. Calrissian and Vobah splinted Fybot's legs, broken during the event. The ship's crew then repaired the damage sustained during the voyage and the fight against the Renatasians. During a break, Calrissian and Vobah ate a meal from free-fall trays while Vuffi Raa and Fybot played sabacc.
Later, Calrissian, wearing a vacuum suit, began riveting micropoles to the Falcon's hull to improve its shielding. Assisted by Vuffi Raa, monitoring from inside, Calrissian tired of the claustrophobic work and returned for a five-minute break. Vuffi Raa also noted that a slight offset of the crevasse from perpendicular to the Flamewind would have amplified the phenomenon's effects instead of diminishing them.
Calrissian removed his vacuum suit to use the ship's toilet. Fybot, believing Calrissian had become a liability to their mission to arrest Bohhuah Mutdah on Oseon 5792, and secretly working for Mutdah, sabotaged the captain's suit by crossprogramming its communicator with its cooling system.
After Calrissian began fastening micropoles on the Falcon's upper hull, his suit began to overheat due to the sabotage. Unable to raise the ship on his communicator and potentially unable to return to the airlock in time, Calrissian communicated with Vuffi Raa by rapping against the airlock's wheel with his riveting gun. Vobah, also in a vacuum suit, retrieved Calrissian, and Vuffi Raa determined the suit had been sabotaged.
After recovering, Calrissian had another meal. He and Vuffi Raa unsuccessfully attempted to determine the asteroid's location using the damaged navigation computer. When the droid mentioned his useless knowledge from the system's catalog, Calrissian decided to follow the pre-programmed course to Oseon 5792 and correct the error as they approached.
While discussing his suspicions about the attempted kill with Vobah and Fybot, Vuffi Raa summoned Calrissian to the ship's bridge as the Renatasian squadron approached. Recalling a conversation about diamonds with Vuffi Raa, Calrissian devised a plan to evade the starfighters.
As the Renatasian flybys increased, Calrissian gradually expanded the Falcon's deflector shields, normally concentrated near the ship's surface. The shields pushed against the canyon walls until a fighter discovered the Falcon. Calrissian then maximized the shields' distance, causing the asteroid to explode. The resulting debris damaged the Renatasian squadron, destroying at least eight starfighters and preventing them from attacking as the Falcon resumed its voyage to Oseon 5792.
The asteroid appeared in Lando Calrissian and the Flamewind of Oseon, the 1983 second novel in The Lando Calrissian Adventures trilogy by L. Neil Smith. The novel describes the crevasse as both "seventy or eighty kilometers long" and "hundreds of kilometers in extent." This article assumes the latter is an error.
"Twinkle, Twinkle Little Star, How I Wonder Where We Are," a 1990 roleplaying game source article in the thirteenth issue of Voyages SF, placed the Oseon system in the Zebitrope sector. As it was released outside of Lucas Licensing, its canonicity in Star Wars Legends was unconfirmed. The 2009 The Essential Atlas overrode this, placing the Oseon system in grid square T-8 as part of the Centrality.