Erriapus

Minor Spiritwell-documentedmodern astronomical nomenclature

Erriapus (Saturn XXVIII) is a mid-sized irregular prograde moon of Saturn, a member of the Gallic group of satellites. It is an astronomical object with measured orbital and physical properties and a name taken from a figure in Gaulish mythology; it is not treated as a living spirit in the provided sources.

Origin

Discovery and formation: Erriapus was discovered and provisionally designated S/2000 S 10 (discovery details and discoverer names are recorded in the astronomical literature). It is thought not to have formed at Saturn but to be a captured heliocentric body; within that framework, observations and color similarities place it in the Gallic group and have led to the hypothesis that Tarvos and Erriapus could be fragments of the larger Albiorix following collisional disruption. The name was assigned in August 2003 after a figure in Gaulish mythology and administratively changed from the dative form 'Erriapo' to the nominative 'Erriapus' by the IAU in late 2007 to conform with naming conventions.

Appearance

Observationally, Erriapus has an estimated average diameter of about 10 kilometers (assuming an albedo of 6%). It is red in color with color indices B−V = 0.83 and R−V = 0.49, similar to other members of the Gallic group. Lightcurves show large brightness variations indicative of an elongated shape or a possible contact-binary structure.

Abilities

Physical and orbital characteristics: Erriapus orbits Saturn at an average distance of approximately 17.5 million kilometers with an orbital period of 864.92 days in a prograde direction. Its orbital inclination is about 37° to the ecliptic and its eccentricity is reported near 0.475. Its rotation period, measured by Cassini ISS, is 28 hours and 9 minutes; it is thought to rotate on its side. Its orbit is subject to continuous changes from solar and planetary perturbations.

Weaknesses & Wards

Weaknesses

  • other
    Not applicable – natural satellite, no magical vulnerabilities or protections documented

Wards

  • other
    Not applicable – no cultural wards or protective rituals documented for this astronomical object
Further in the Grimoire

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Community Record

Sources
  1. [1]
    Erriapus — Wikipedia. Wikipedia contributors. "Erriapus." Wikipedia, The Free Encyclopedia. https://en.wikipedia.org/wiki/Erriapuswiki
  2. [2]
    Erriapus — Wikidata. Wikidata entry Q18004 "Erriapus". http://www.wikidata.org/entity/Q18004wiki
well-documented