Item #: SCP-5791
Object Class: Keter
Special Containment Procedures: [DATA NON-EXISTENT] SCP-5791 is currently scouring the planet Earth, under constant supervision of 35 NEON mobile stations positioned by Site Directors (SD-5791) globally. Long-distance picoscopic thermal ultra-imaging (LDPTUI) scans register its location upon observation, and location thereafter is calculated through probability functions. Upon a case of entrance in any household/establishment containing humans, Operation Diverges is to be administered with extreme care and supervision:
- The subject/s SCP-5791-An is/are to be quarantined in human-sized acrylic glass cages, with the illumination of high-intensity arc lamp spotlights, slowly descended and placed carefully from where they are currently standing. The subjects must STAY EXACTLY WHERE THEY ARE.
- Shadow of SCP-5791-An must not have direct contact with any other proximate shadow. MTF Epsilon-6 is in charge of subject containment procedures and monitoring SCP-5791's location.
- The glass cages will contain only a single object (SO) that produces a shadow.
- Upon entry of the glass cages, SCP-5791-An is to stand near the SO and await further instructions from the monitoring MTF, for SCP-5791 to exit the subject's shadow and relocate to SO's shadow.
- Upon verified relocation, SCP-5791-An is to be released and returned to its household/establishment. MTF Zeta-9 is in charge of subsequent containment procedures if an attempt with SO is successful. A successful operation happens about 5.79% of the time, where SCP-5791 is enclosed until sudden quantum tunneling allows it to escape.
- Otherwise, both SCP-5791-An and corresponding SO will fall at an initial velocity of 5 m/s and an acceleration of 9 m/s2 into SCP-5791-A.
The phenomenon when SCP-5791-A occurs is termed as shadowing.
Description: SCP-5791 is currently of unknown measurement and origin, with all observations of it only existing within shadows. Different proposals for SCP-5791's form are stated as follows:
- SR1 Atmillo's theory describes SCP-5791 as a point in three-dimensional space similar to a singularity and will possibly decay in ██████ years.
- SR Cínolone states SCP-5791 as one of the Four Horsemen of the Apocalypse and apparently serves as proof for the existence of a God.
- SR Gunnia describes SCP-5791 as a two-dimensional anomaly, occurring only on Earth's tangible surfaces. According to her theory, SCP-5791's "dark strength" depends on existing illumination, but nonetheless effectively shadows various subjects.
- SR Morrison expounds on SCP-5791's properties in water. Logs SCP-5791-OL195 to -OL273 specify how the subjects submerged in water with SCP-5791 are apparently sliced and distributed evenly during shadowing.
- SR Hickson's theory, a.k.a. the Atmillo-Gunnia Theory unifies the two SRs' researches while including supporting equations. The model describes an almost massless point with a particle-wave duality, comparable to an electron.
- SR Dengienne states that SCP-5791 is deterministic, how SCP-5791's mobility is affected by its environment about 97.51% of the time and theorizes a parallel universe where many SCP-5791-An subjects eventually end up2.
- SR Riviera derives from Dengienne's study and expounds on SCP-5791 as an entrance to a pocket dimension, and adds that it requires additional dimensions (at least 1█ more) to further understand it since it doesn't seem to be affected by gravity.
SCP-5791-A is a dark region created by SCP-5791 at random times. SCP-5791-A's presentation interval varies from once to thrice every Earth's rotation. Due to its strange nature, SCP-5791-A is colloquially the "hole", where SCP-5791-An colloquially "fall". Due to SCP-5791's inconsistent intervals, and the uncertainty of return3, there has never been any attempt at gathering data within SCP-5791-A.
SCP-5791-An, where n refers to ordinal count4, are temporary names for subjects whose shadows have SCP-5791 in them. This is generally used by the MTFs for quick referral of subjects, and the ordinal count is reset every time Operation Diverges is ceased. Reported cases have subjects ranging from humans (75%) and other living things (20%) to inanimate objects (5%).
The following logs are the most insightful to understanding SCP-5791's true nature and its effects on humanity. Only a few are selected and are available for this database, including testimonials and interviews.
Observational Logs: Historical Evidence






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