Editing Installation 09

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{{Disambig header|the second replacement megastructure|other uses|Installation 04 (disambiguation)}}

|destroyed=

|diameter={{Convert|10000|km|mi}}<ref name="VIS">'''[[Halo: The Essential Visual Guide]]'''</ref>

|surface width={{Convert|318|km|mi}}<ref name="VIS"/>

|gravity=.992G (approx)<ref name="VIS"/>

|surface temperature=-23°C to 40°C (-9°F to 104°F) (controlled)<ref name="VIS"/>

|atmosphere=1 ([[Wikipedia:Nitrogen|N₂]], [[Oxygen|O₂]])<ref name="VIS"/>

{{Quote|I discovered the Ark keeps an almost finished ring in its central forges at all times. It's an emergency replacement in case one of the other rings breaks down.|[[Ellen Anders]] on the Halo.<ref name="FTD">'''[[Halo Wars 2]]''', campaign level ''[[From the Deep]]''</ref>}}

'''Installation 09'''<ref>[https://www.reddit.com/r/halo/comments/70wbxc/return_to_the_denomination_installation_04_b_c/dn6n4h7/ ''Reddit: Return to the denomination. Installation 04 (B), (C). Canonically. 343 PLS'' (comment by GrimBrotherOne)]</ref><ref group="note">The Halo is known internally by [[343 Industries]] as Installation 09, with the previous replacement for Installation 04 being Installation 08, with the numbers being assigned according to the rings' construction order. Although the ''[[Halo Encyclopedia]]'' refers to the original replacement ring as Installation 04B, no canonical source has indicated that this naming convention has been retained; if so, the Halo in question would presumably be Installation 04C.</ref> or '''Anders' Halo''' after [[Ellen Anders|its discoverer]] during the [[Second Ark Conflict|battle for the Ark]] in [[2559]], is a [[Halo Array|Halo installation]] which was constructed at the [[Installation 00|Ark]] after the [[Raid on Installation 08|destruction]] of the [[Installation 08|previous replacement]] for the original [[Installation 04]].<ref name="FTD"/>

In the final months of the [[Human-Covenant War]], [[Installation 00]] constructed a replacement for [[Installation 04]], which had been destroyed by [[John-117]] during the [[Battle of Installation 04]]. The still-incomplete replacement ring, [[Installation 08]], was launched from the Ark's [[Foundry]] during the [[Battle of Installation 00|war's final battle]], but was subsequently destroyed by its own premature firing, initiated by the Master Chief and [[Cortana]] in order to sterilize a [[Flood]] incursion on the Ark. The ring's firing severely damaged the Ark, though the massive installation was able to repair itself in time, and by [[2559|March 2559]], the Ark's Foundry had finished constructing a new replacement ring, Installation 09.<ref name="FTD"/>

During the battle between the [[UNSC]] forces of the {{UNSCShip|Spirit of Fire}} and the [[Banished]] occupying the Ark, the newly built replacement Halo was discovered by [[Ellen Anders|Professor Ellen Anders]]. Consequently, she and [[Captain James Cutter]] formulated a plan to deploy the ring to the [[Soell system]], [[Installation 04]]'s former site, where it could be used to raise a [[distress beacon]] to the UNSC.<ref name="FTD"/> While the Banished contested the UNSC for control of the new Halo, the humans gained a foothold, allowing Anders to enter the [[control room]] where she successfully disarmed the ring's firing mechanism and manipulated its [[gravity anchor]]s to eject a section of the Halo's landmass housing Banished forces into space. Although the UNSC forces evacuated to their ship, Anders could not make it out of the control room in time before Installation 09 entered a [[slipspace portal]] to the Soell system. En route to its destination, however, the Halo was intercepted by a [[Guardian]].<ref>'''[[Halo Wars 2]]''', campaign level ''[[Last Stand]]''</ref>

File:HW2-Halo in slipspace.jpg|The Halo exiting slipspace.

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[[Category:Installation 04C locations| ]]