Sirona, officially known as Groombridge 1618 b, is a small UNSC colony in the Groombridge System, the first and only planet in the system, with the object formally suspected to be a gas giant in orbit around Groombridge 1618 in the early 21st century proven to be nonexistent. It is notable for the large number of resources that have uses within the medicinal industry, leading to the planet's development as a industrial world focused on the production of drugs and other medical supplies, leading to it being a target during the Insurrection and proving quite useful during the Human-Covenant war. Additionally, while not visible from the surface, a large number of Forerunner structures sat buried in the crust of the planet.
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| rdfs:label
| - Sirona (Groombridge 1618 b)
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| rdfs:comment
| - Sirona, officially known as Groombridge 1618 b, is a small UNSC colony in the Groombridge System, the first and only planet in the system, with the object formally suspected to be a gas giant in orbit around Groombridge 1618 in the early 21st century proven to be nonexistent. It is notable for the large number of resources that have uses within the medicinal industry, leading to the planet's development as a industrial world focused on the production of drugs and other medical supplies, leading to it being a target during the Insurrection and proving quite useful during the Human-Covenant war. Additionally, while not visible from the surface, a large number of Forerunner structures sat buried in the crust of the planet.
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| Period
| - *153.461 Earth Days
*132.047 Sironan Days
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| Name
| - Sirona
*Groombridge 1618 b
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| atmosphere composition
| - *Nitrogen: 79.183%
*Oxygen: 20.443%
*Argon: 0.223%
*Carbon Dioxide: 0.093%
*Neon: 0.044%
*Other Elements: 0.014%
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| abstract
| - Sirona, officially known as Groombridge 1618 b, is a small UNSC colony in the Groombridge System, the first and only planet in the system, with the object formally suspected to be a gas giant in orbit around Groombridge 1618 in the early 21st century proven to be nonexistent. It is notable for the large number of resources that have uses within the medicinal industry, leading to the planet's development as a industrial world focused on the production of drugs and other medical supplies, leading to it being a target during the Insurrection and proving quite useful during the Human-Covenant war. Additionally, while not visible from the surface, a large number of Forerunner structures sat buried in the crust of the planet. Sirona was one of the few UNSC controlled planets to escape the war still under UNSC control, with the Covenant refraining from glassing the surface. While the reasons they didn't do so are largely unclear, the large resistance put up by the UNSC Air Force and Navy forces in the system played a part, as well as the Covenant realizing that they only needed to blockade the planet to restrict UNSC access to the medical supplies and facilities offered by Sirona and gain control of the Forerunner ruins, an action that required far fewer ships than glassing. With the other battles that were raged in the four years of the Siege of Sirona, many UNSC historians believe that the Covenant had believed this to be the best course of action and had deployed fleets that could have enabled the glassing of the planet to other engagements. Due to being a target in the Insurrection, the Human-Covenant war, and several post war conflicts, Sirona is one of the most war scarred planets that has never left the control of the UNSC. The largest contributor to the war damages on the planet was the 4 year long Siege of Sirona, which started in 2544 and ended only due to the diversion of the Covenant forces still in orbit of the planet to the Battle of Meridian in 2548.
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![[RDF Data]](/fct/images/sw-rdf-blue.png)